This list of

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...

described in 2018 is a list of new taxa of

jawless vertebrates Agnatha (, Ancient Greek 'without jaws') is an infraphylum of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct ( conodonts and ostracoderms) species. Among recent animals, cyclosto ...

, placoderms,

acanthodians Acanthodii or acanthodians is an extinct class of gnathostomes (jawed fishes), typically considered a paraphyletic group. They are currently considered to represent a grade of various fish lineages leading up to the extant Chondrichthyes, which ...

, fossil

cartilaginous fish Chondrichthyes (; ) is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or ''bony fishes'', which have skeletons primarily composed of bone tissue ...

bony fish Osteichthyes (), popularly referred to as the bony fish, is a diverse superclass of fish that have skeletons primarily composed of bone tissue. They can be contrasted with the Chondrichthyes, which have skeletons primarily composed of cartilag ...

, and other fish of every kind that are scheduled to be described during the year 2018, as well as other significant discoveries and events related to

paleontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ...

of fish that are scheduled to occur in 2018.

Research

* A study on the fossil fish occurrences and habitat during the middle

Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ...

(480 million to 360 million years ago) is published by Sallan ''et al.'' (2018), who interpret their findings as indicating that early jawed and jawless fish originated in restricted, shallow intertidal-subtidal environments. * A survey of

Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ...

fish fauna from

Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...

is published by Stack & Sallan (2018). * A study on the ecological diversification of thelodonts is published by Ferrón ''et al.'' (2018). * The first occurrence of pelvic girdles and

intromittent organ An intromittent organ is any external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most often in terrestrial species, as most non-mammalian aquatic species fertilize their eggs e ...

s in '' Euphanerops longaevus'', associated with a morphologically differentiated region of the axial skeleton, is reported by Chevrinais ''et al.'' (2018). * A study on the identity of the aspidin (a primitive bone-like tissue of

heterostracans Heterostraci (Ancient Greek, ἕτερος+ὄστρακον "those itha different shell" i is pl. of -us is an extinct subclass of pteraspidomorph jawless vertebrate that lived primarily in marine and estuary environments. Heterostraci exis ...

) is published by Keating ''et al.'' (2018), who interpret aspidin as an acellular dermal bone. * Redescription of '' Tesseraspis mosaica'' is published by Blieck, Elliott & Karatajūtė-Talimaa (2018). * A study on the morphological and taxonomic diversity of pteraspidiforms is published by Romano, Sansom & Randle (2018). * A study on the diversity of jaw shapes in modern and

jawed fishes, evaluating whether the full extent of jaw morphological variation was established early in

gnathostome Gnathostomata (; from Greek: (') "jaw" + (') "mouth") are the jawed vertebrates. Gnathostome diversity comprises roughly 60,000 species, which accounts for 99% of all living vertebrates, including humans. In addition to opposing jaws, living ...

evolutionary history, is published by Hill ''et al.'' (2018). * New specimens of '' Brindabellaspis stensioi'', providing new information on the morphology of the rostral region of the skull, are described from the Lower

of the

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

(

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

) by King, Young &

Long Long may refer to: Measurement * Long, characteristic of something of great duration * Long, characteristic of something of great length * Longitude (abbreviation: long.), a geographic coordinate * Longa (music), note value in early music mensur ...

(2018). * Redescription of the

antiarch Antiarchi ("opposite anus") is an order of heavily armored placoderms. The antiarchs form the second-most successful group of placoderms after the arthrodires in terms of numbers of species and range of environments. The order's name was coi ...

placoderm '' Asterolepis thule'' and a study on the age of the deposits preserving the fossils of this species is published by Newman & Den Blaauwen (2018). * Description of bony pelvic plates in 32 specimens of '' Bothriolepis canadensis'' from the Upper

Escuminac Formation The Escuminac Formation is a geologic formation in Quebec. It preserves fossils dating back to the Devonian period. Description Miguasha National Park is located within this formation along the estuary of the Restigouche River on the south coas ...

(

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

) is published by Charest, Johanson & Cloutier (2018), who reject the interpretation of these structures as genital plates (suggested by Long ''et al.'', 2015), and identify them as the pelvic girdle instead. * Redescription of the antiarch placoderm ''

Phymolepis ''Phymolepis'' is an extinct genus of yunnanolepidid placoderm from the Early Devonian of China. The type species, ''P. cuifengshanensis'', was named by Zhang Goroui in 1978Chang, K-J. (1978). Symposium on the Devonian System of South China: ...

cuifengshanensis'' and a study on the phylogenetic relationships of this species is published by Wang & Zhu (2018). * A study on the

morphology Morphology, from the Greek and meaning "study of shape", may refer to: Disciplines *Morphology (archaeology), study of the shapes or forms of artifacts *Morphology (astronomy), study of the shape of astronomical objects such as nebulae, galaxies, ...

of the skull, especially the braincase of the

petalichthyid Petalichthyida is an extinct order of small, flattened placoderm fish. They are typified by their splayed pectoral fins, exaggerated lateral spines, flattened bodies, and numerous tubercles that decorated all of the plates and scales of their a ...

placoderm '' Shearsbyaspis oepiki'' is published by Castiello & Brazeau (2018). * Fossil interpreted as placoderm ( arthrodiran) egg cases are described from the

(

Famennian The Famennian is the latter of two faunal stages in the Late Devonian Epoch. The most recent estimate for its duration estimates that it lasted from around 371.1 million years ago to 359.3 million years ago. An earlier 2012 estimate, still used b ...

) Cleveland Shale (

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

) by Carr & Jackson (2018). * Circular or near-circular patterned trace fossils, similar to underwater circles produced by male

pufferfish Tetraodontidae is a family of primarily marine and estuarine fish of the order Tetraodontiformes. The family includes many familiar species variously called pufferfish, puffers, balloonfish, blowfish, blowies, bubblefish, globefish, swellfis ...

es, are described from the Upper

Hongguleleng Formation (

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

) by Zong & Gong (2018), who consider it possible that these fossils may be structures made by male fish to attract females. * Redescription of '' Gladbachus adentatus'' and a study on the phylogenetic relationships of the species is published by Coates ''et al.'' (2018). * A study on the wear of a tooth whorl of a specimen of ''

Edestus ''Edestus'' is an extinct genus of edestoid cartilaginous fish known from the Late Carboniferous ( Pennsylvanian) of the United Kingdom, Russia, and the United States. Most remains consist of isolated curved blades or "whorls" that are studded wi ...

heinrichi'', as well as on its implications for inferring the function of the tooth whorls in this species, is published by Itano (2018). * New description of ''Edestus'', providing new information on the anatomy of this taxon, is published online by Tapanila ''et al.'' (2018). * Two partial specimens of a callorhynchid chimaeroid left in open nomenclature are described from the Upper Kimmeridgian Nusplingen Plattenkalk (

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

) by Duffin (2018). * A study on the teeth

histology Histology, also known as microscopic anatomy or microanatomy, is the branch of biology which studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures vis ...

and vasculature of the oldest known tooth-bearing sharks, '' Leonodus carlsi'' and '' Celtiberina maderi'', is published by Martinez-Perez ''et al.'' (2018). * The first known

basicranium The base of skull, also known as the cranial base or the cranial floor, is the most inferior area of the skull. It is composed of the endocranium and the lower parts of the calvaria. Structure Structures found at the base of the skull are for ...

of '' Carcharopsis wortheni'' is described from the

Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

Fayetteville Shale (

) by Bronson, Mapes & Maisey (2018). * A study on the morphology of the braincase of ''

Tristychius ''Tristychius'' (from el, τρεις , 'three' and el, στῐ́χος 'row') is an extinct genus of shark from the Carboniferous period ( Visean). Fossils of ''T. arcuatus'', the type and only species, including fin spines have been found in ...

arcuatus'' is published by Coates & Tietjen (2018). * A diverse fauna of

Early Triassic The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between Ma and Ma (million years ago). Rocks from this epoch are collectively known as the Lower Triassic Series, which is a un ...

cartilaginous fishes is described from the

Vikinghøgda Formation The Vikinghøgda Formation is a geologic formation in Svalbard, Norway. It preserves fossils dating back to the Early Triassic (Griesbachian-Spathian) period. It is split into three members, from oldest to youngest: the Deltadalen Member (Induan ...

(

Spitsbergen Spitsbergen (; formerly known as West Spitsbergen; Norwegian: ''Vest Spitsbergen'' or ''Vestspitsbergen'' , also sometimes spelled Spitzbergen) is the largest and the only permanently populated island of the Svalbard archipelago in northern Norw ...

Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...

) by Bratvold, Delsett & Hurum (2018). * The first material referable to hybodont shark (a member of the genus '' Asteracanthus'') is described from the Lower Jurassic (

Toarcian The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian ...

) Rosso Ammonitico Formation (

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

) by Romano ''et al.'' (2018), providing new information on the dispersal of this genus in the Jurassic Tethys. * The first scroll

coprolite A coprolite (also known as a coprolith) is fossilized feces. Coprolites are classified as trace fossils as opposed to body fossils, as they give evidence for the animal's behaviour (in this case, diet) rather than morphology. The name is de ...

s from the

Mesozoic The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceo ...

reported so far, likely produced by

euryhaline Euryhaline organisms are able to adapt to a wide range of salinities. An example of a euryhaline fish is the molly (''Poecilia sphenops'') which can live in fresh water, brackish water, or salt water. The green crab (''Carcinus maenas'') is an e ...

hybodontid sharks, are described from the Upper Triassic

Tiki Formation The Tiki Formation is a Late Triassic (Carnian to Norian) geologic formation in Madhya Pradesh, northern India.India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

by Rakshit ''et al.'' (2018), who name a new coprolite taxon '' Tikicopros triassicus''. * Description of new remains of the Late Jurassic

shark Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimo ...

Palaeocarcharias ''Palaeocarcharias'' is an extinct genus of shark, known from the Middle-Late Jurassic of Europe. It has only a single named species, ''P. stromeri,'' which is known from exceptionally preserved specimens from the Late Jurassic (Tithonian) of Germ ...

stromeri'' and a study on the anatomy and phylogenetic relationships of this species is published by Landemaine, Thies & Waschkewitz (2018), who name a new order Palaeocarchariiformes and a new family Palaeocarchariidae. * Description of an articulated skeleton of a member of the palaeospinacid genus '' Synechodus'' from the

Lower Cretaceous Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Lower Wick is a small hamlet located in the county of Gloucestershire, England. It is situated about five miles south west of Dursley, eight ...

( Albian) Saint-Pô Formation (

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

), and a revision of the taxonomic history of the species assigned to the genus ''Synechodus'', is published by Mollen & Hovestadt (2018). *

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

taxon '' Platylithophycus cretaceus'' known from the

Niobrara Chalk The Niobrara Formation , also called the Niobrara Chalk, is a geologic formation in North America that was deposited between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian stages of the Late Cretaceous. It is compose ...

Kansas Kansas () is a state in the Midwestern United States. Its capital is Topeka, and its largest city is Wichita. Kansas is a landlocked state bordered by Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the ...

(

), considered to be a

green alga The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/Streptophyta. The land plants (Embryophytes) have emerged deep in the Charophyte alga as ...

or a

cuttlefish Cuttlefish or cuttles are marine molluscs of the order Sepiida. They belong to the class Cephalopoda which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone, which is used for control of ...

in earlier publications, is reinterpreted as a member of Elasmobranchii by Bronson & Maisey (2018). * A study on the microstructure of

enameloid Enameloid, also known as durodentine or vitrodentine, is an enamel-like tissue found in many fish. It is the primary outer component of shark odontodes (teeth and dermal denticles). Although the origin of enameloid is debated, it is probably hom ...

in the isolated teeth of archaeobatid batomorphs '' Toarcibatis elongata'', '' Cristabatis crescentiformis'' and '' Doliobatis weisi'' from the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

(

) localities of Halanzy (

Belgium Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to th ...

) and Ginzebierg (

Luxembourg Luxembourg ( ; lb, Lëtzebuerg ; french: link=no, Luxembourg; german: link=no, Luxemburg), officially the Grand Duchy of Luxembourg, ; french: link=no, Grand-Duché de Luxembourg ; german: link=no, Großherzogtum Luxemburg is a small lan ...

) is published by Manzanares, Botella & Delsate (2018). * A study on the structure of teeth of ''

Myledaphus ''Myledaphus'' is a genus of Late Cretaceous cartilaginous fish whose fossils are known from Canada, the Midwest of the United States, Olmos Formation of the Difunta Group of Mexico, and the Beshtyubin and Bissekty Formations of Uzbekistan. ...

pustulosus'' from the

Upper Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

(

Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from ...

) Hell Creek Formation (

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

) is published by Hoffman, Jensen & Hageman (2018). * Isolated teeth of the

sand shark Sand sharks, also known as sand tiger sharks, gray nurse sharks or ragged tooth sharks, are Lamniformes, mackerel sharks of the family (biology), family Odontaspididae. They are found worldwide in temperate and tropical waters. The three specie ...

'' Brachycarcharias lerichei'' are described from the

Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' ...

(

Ypresian In the geologic timescale the Ypresian is the oldest age (geology), age or lowest stage (stratigraphy), stratigraphic stage of the Eocene. It spans the time between , is preceded by the Thanetian Age (part of the Paleocene) and is followed by th ...

)

La Meseta Formation The La Meseta Formation is a sedimentary sequence deposited during the Eocene. The formation is found on Seymour Island, Antarctica. Description La Meseta Formation lies unconformably on the Cretaceous Lopez de Bertodano Formation. It is an app ...

(

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest contine ...

) by Marramà ''et al.'' (2018), representing the southernmost occurrence of the genus ''Brachycarcharias'' reported so far. * A study on the anatomy, paleobiology and paleoecology of the

requiem shark Requiem sharks are sharks of the family Carcharhinidae in the order Carcharhiniformes. They are migratory, live-bearing sharks of warm seas (sometimes of brackish or fresh water) and include such species as the tiger shark, bull shark, le ...

Eogaleus ''Eogaleus'' is an extinct genus of requiem shark from the Eocene epoch. It contains a single species, ''E. bolcensis''. It is known from multiple articulated individuals from the Bolca Konservat−Lagerstätte of the Ypresian In the geologic ...

bolcensis'' is published by Marramà, Carnevale & Kriwet (2018). * Teeth of members of the genera ''

Galeorhinus The school shark (''Galeorhinus galeus'') is a houndshark of the family Triakidae, and the only member of the genus ''Galeorhinus''. Common names also include tope, tope shark, snapper shark, and soupfin shark. It is found worldwide in temperate ...

'' and '' Physogaleus'' are described from the Lower Eocene sediments of the Khuiala Formation (

Jaisalmer basin {{Use Indian English, date=May 2022 The Jaisalmer basin is one of the parts of the Rajasthan basin in northwestern India. This basin is geographically shared with Pakistan to the west. Jaisalmer basin ages back to Mesozoic and Cenozoic. It is a p ...

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

) by Pandey, Chaskar & Case (2018). * A study on the teeth mineralization process and teeth

in extant and fossil members of the genus ''

Hemipristis ''Hemipristis'' (from el, ἡμι , 'half' and el, πρίστης 'saw') is a genus of weasel sharks, family Hemigaleidae. It contains one extant species, the snaggletooth shark (''H. elongata'') and several extinct species. ''Hemipristis'' ...

'' is published by Jambura ''et al.'' (2018). * A study on the global and regional morphological variation of the teeth of the ground sharks and

mackerel sharks The Lamniformes (, from Greek ''lamna'' "fish of prey") are an order of sharks commonly known as mackerel sharks (which may also refer specifically to the family Lamnidae). It includes some of the most familiar species of sharks, such as the gre ...

across the Cretaceous–Paleogene boundary is published by Bazzi ''et al.'' (2018). * A study on the anatomy and evolution of teeth of members of the families

Megachasmidae ''Megachasma'' is a genus of sharks. It is usually considered to be the sole genus in the distinct family Megachasmidae, though suggestion has been made that it may belong in the family Cetorhinidae, of which the basking shark is currently the so ...

and

Cetorhinidae Cetorhinidae is a family of filter feeding mackerel sharks, whose members are commonly known as basking sharks. It includes the extant basking shark, ''Cetorhinus'', as well as two extinct genera, ''Caucasochasma'' and ''Keasius ''Keasius'' is ...

, based on data from recent and fossil teeth, is published by Mitchell, Ciampaglio & Jacquemin (2018). * A study on the physiological, ecological and life-history traits which influenced the biogeographic distributions of cartilaginous fishes from the

Neogene The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period Mya. ...

to the present is published by Villafaña & Rivadeneira (2018). * A review of the present and past (

Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ...

–

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...

) shark and ray diversity in marine waters of Tropical America is published by Carrillo-Briceño ''et al.'' (2018). * A study on the phylogenetic relationships of extant and fossil squalomorph sharks as indicated by teeth

is published by Flammensbeck ''et al.'' (2018). * A study on the morphology and phylogenetic relationships of an early bony fish known from two partial skulls recovered from the

( Emsian) Taemas Limestones of the Burrinjuck area (

), possibly belonging to the genus ''

Ligulalepis ''Ligulalepis'' is an extinct genus of prehistoric bony fish. ''Ligulalepis'' was first described from isolated scales found in the Taemas-Wee jasper limestones of New South Wales (Early Devonian age) by Dr Hans-Peter Schultze (1968) and further ...

'' (described on the basis of isolated scales), is published by Clement ''et al.'' (2018). * Redescription of ''

Elonichthys ''Elonichthys'' is an extinct genus of prehistoric bony fish. The genus is represented by several species from Carboniferous and Permian of Europe, Greenland, South Africa, and North America. Species See also * Prehistoric fish The evo ...

germari'' is published by Schindler (2018), who presents the first reconstruction of the skull of this species. * Redescription of the neotype of the elonichthyid ''

Rhabdolepis ''Rhabdolepis'' is an extinct genus of prehistoric bony fish that lived during the Late Permian epoch. See also * Prehistoric fish * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: P ...

macropterus'' is published by Schindler (2018), who presents new reconstruction of the skull of this species. * A revision of ray-finned fishes from the Permian locality Buxières-les-Mines (Bourbon-l’Archambault Basin,

) is published by Štamberg (2018). * A study on the effect of Permian–Triassic and Triassic–Jurassic extinction events on

ray-finned fishes Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or h ...

is published by Smithwick & Stubbs (2018). * A study on the evolutionary history of ray-finned fishes across the

Cretaceous–Paleogene extinction event The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the ...

, as indicated by isolated fossil teeth preserved in a South Pacific sediment core spanning 72–43 Ma, is published by Sibert ''et al.'' (2018). * A study on the morphological variation of the dorsal finlets in extant bichirs, testing the viability of these anatomic structures as a tool for taxonomic diagnoses in the study of fossil members of this group, is published by Coelho, Cupello & Brito (2018). * New data on the reproductive biology of the species ''

Saurichthys ''Saurichthys'' (from el, σαῦρος , 'lizard' and el, ἰχθῦς 'fish') is an extinct genus of predatory ray-finned fish from the Triassic period. It type genus family Saurichthyidae (Changhsingian- Middle Jurassic), and the larges ...

curionii'' and ''Saurichthys macrocephalus'' from the

Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between Ma and ...

Meride Limestone ( Monte San Giorgio,

Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

) is presented by Maxwell ''et al.'' (2018), who identify six specimens as unambiguously gravid. * A study on the internal anatomy of the skulls of two Early Triassic specimens of ''Saurichthys'', as well as on the phylogenetic relationships of saurichthyiforms, is published by Argyriou ''et al.'' (2018). * A comparative study on the bony labyrinth of early neopterygians, including relatives of gars and teleosts, is published by Giles, Rogers & Friedman (2018). * A study on the diversity of body shapes of neopterygians from the

Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period ...

to the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

is published by Clarke & Friedman (2018). * Redescription and taxonomic reassessment of the

pycnodontiform Pycnodontiformes is an extinct order of primarily marine bony fish. The group first appeared during the Late Triassic and disappeared during the Eocene. The group has been found in rock formations in Africa, Asia, Europe, North and South America ...

genus '' Cosmodus'' is published by Vullo ''et al.'' (2018). * A study on 52 specimens of ''

Pycnodus ''Pycnodus'' (from el, πυκνός , 'dense' and el, ὀδούς 'tooth') is an extinct genus of ray-finned fish ranging from the Jurassic to Eocene periods. As its name suggests, it is the type genus of Pycnodontiformes. The known whole ...

'' from the

Monte Bolca Monte Bolca is a lagerstätte near Verona, Italy that was one of the first fossil sites with high quality preservation known to Europeans, and is still an important source of fossils from the Eocene. Geology Monte Bolca was uplifted from the T ...

Lagerstätte A Lagerstätte (, from ''Lager'' 'storage, lair' '' Stätte'' 'place'; plural ''Lagerstätten'') is a sedimentary deposit that exhibits extraordinary fossils with exceptional preservation—sometimes including preserved soft tissues. These for ...

(

), evaluating whether the morphological variability within the sample might be related to inter- or intraspecific variation, is published by Cawley ''et al.'' (2018). * A study on the anatomical structure and possible function of the flank bar-scales of members of Pycnodontiformes is published by Capasso (2018). * A revision of the phylogenetic relationships of the fossils fishes belonging to the group

Halecomorphi Halecomorphi is a taxon of ray-finned bony fish in the clade Neopterygii. The sole living Halecomorph is the bowfin (''Amia calva''), but the group contains many extinct species in several families (including Amiidae, Caturidae, Liodesmidae, S ...

is published by Ebert (2018). * A redescription of '' Asialepidotus shingyiensis'' and a study on the phylogenetic relationships of the species is published by Xu & Ma (2018). * A study on the phylogenetic relationships of the

neopterygian Neopterygii (from Greek νέος ''neos'' 'new' and πτέρυξ ''pteryx'' 'fin') is a subclass of ray-finned fish (Actinopterygii). Neopterygii includes the Holostei and the Teleostei, of which the latter comprise the vast majority of extant f ...

'' Ticinolepis'', as well as on the relationships of the fossil neopterygians in general, is published by López-Arbarello & Sferco (2018). * A study on the locomotion energetics of ''

Leedsichthys ''Leedsichthys'' is an extinct genus of pachycormid fish that lived in the oceans of the Middle to Late Jurassic.Liston, JJ (2004). An overview of the pachycormiform ''Leedsichthys''. In: Arratia G and Tintori A (eds) Mesozoic Fishes 3 - System ...

problematicus'', possible factors that drove the gigantism in pachycormiforms and the metabolic limits of body size in ray-finned fishes is published by Ferrón ''et al.'' (2018). * An

ichthyodectiform Ichthyodectiformes is an extinct order of marine stem-teleost ray-finned fish. The order is named after the genus '' Ichthyodectes'', established by Edward Drinker Cope in 1870. Ichthyodectiforms are usually considered to be some of the closest ...

fossil specimen preserving a small skull and anterior part of the trunk is described from a core recovered from a well drilled in the

Cape Verde , national_anthem = () , official_languages = Portuguese , national_languages = Cape Verdean Creole , capital = Praia , coordinates = , largest_city = capital , demonym ...

Basin, ca. 400km offshore from the West African Atlantic Margin, by Casson ''et al.'' (2018). * A study on the evolutionary history of the family Catostomidae, based on data from molecules, morphology and fossil record, is published by Bagley, Mayden & Harris (2018). * A study on the phylogenetic relationships of members of

Acanthomorpha Acanthomorpha (meaning "thorn-shaped") is an extraordinarily diverse taxon of teleost fishes with spiny rays. The clade contains about one third of the world's modern species of vertebrates: over 14,000 species. A key anatomical innovation in ...

and on the timescale of the radiation of this group is published by Alfaro ''et al.'' (2018), who report that crown ages for five of the six major percomorph sub

clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...

s, and for the bulk of the species diversity in the sixth, coincide with the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...

–

Paleogene The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million yea ...

boundary. * A study on the morphology of the skeleton of ''

Pholidophorus ''Pholidophorus'' (from el, φολῐ́ς , 'horny scale' and el, φέρω , 'to bear') is an extinct genus of stem-teleost fish. Numerous species were assigned to this genus in the past, but only the type species ''Pholidophorus latiusculus'', ...

latiusculus'', as well as on the phylogenetic relationships of this species, is published by Taverne (2018). * A study on the gill-arch anatomy in

–early

members of Aulopiformes is published by Beckett, Giles & Friedman (2018). * A new specimen of '' Spinocaudichthys'' with preserved intestinal tract is described from the

(

Cenomanian The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the s ...

) Jbel Oum Tkout

(

Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to ...

) by Davesne ''et al.'' (2018). * A study on the bone

of extant

opah Opahs, also commonly known as moonfish, sunfish (not to be confused with Molidae), kingfish, redfin ocean pan are large, colorful, deep-bodied pelagic lampriform fishes comprising the small family Lampridae (also spelled Lamprididae). The famil ...

s, comparing it with bones of their extant and fossil relatives (including ''" Aipichthys" velifer''), and testing the hypothesized link between

endotherm An endotherm (from Greek ἔνδον ''endon'' "within" and θέρμη ''thermē'' "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat released by its internal bodily functions inste ...

y and cellular bone (bone containing embedded osteocyte cells) in teleosts, is published by Davesne ''et al.'' (2018). * An articulated skeleton of a juvenile toadfish distinct from '' Louckaichthys novosadi'' is described from the

Oligocene The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the ...

Bituminous Marls Formation (

Romania Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...

) by Pikryl ''et al.'' (2018). * A study on the dynamics of diversification,

phenotypic In genetics, the phenotype () is the set of observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physiological proper ...

evolution and habitat transitions in the

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or hor ...

group Carangaria after the

is published by Ribeiro ''et al.'' (2018). * A study on the phylogenetic relationships of the fossil snake mackerels and cutlassfishes from the

(

)

London Clay The London Clay Formation is a marine geological formation of Ypresian (early Eocene Epoch, c. 56–49 million years ago) age which crops out in the southeast of England. The London Clay is well known for its fossil content. The fossils from t ...

Formation (

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

) is published by Beckett ''et al.'' (2018). * Detailed description of the caudal skeleton of the

surgeonfish Acanthuridae are the family of surgeonfishes, tangs, and unicornfishes. The family includes about 86 extant species of marine fish living in tropical seas, usually around coral reefs. Many of the species are brightly colored and popular in ...

'' Arambourgthurus scombrurus'' is published by Carnevale & Tyler (2018). * A study on the

of the

percoid fish '' Oligoserranoides budensis'' is published by Bieńkowska-Wasiluk & Pałdyna (2018). * A study on the

Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58Kanapoi site (

Kenya ) , national_anthem = "Ee Mungu Nguvu Yetu"() , image_map = , map_caption = , image_map2 = , capital = Nairobi , coordinates = , largest_city = Nairobi , ...

) and their implications for reconstructing lake and river environments in the Kanapoi Formation is published online by Stewart & Rufolo (2018). * A metacarpal bone of a specimen of ''

Pteranodon ''Pteranodon'' (); from Ancient Greek (''pteron'', "wing") and (''anodon'', "toothless") is a genus of pterosaur that included some of the largest known flying reptiles, with ''P. longiceps'' having a wingspan of . They lived during the late Cr ...

'', bearing teeth marks likely produced by a shark and by a

saurodontid Ichthyodectiformes is an extinct order of marine stem-teleost ray-finned fish. The order is named after the genus '' Ichthyodectes'', established by Edward Drinker Cope in 1870. Ichthyodectiforms are usually considered to be some of the closest r ...

fish, is described from the Campanian

Mooreville Chalk The Mooreville Chalk is a geological formation in North America, within the U.S. states of Alabama and Mississippi, which were part of the subcontinent of Appalachia. The strata date back to the early Santonian to the early Campanian stage of ...

(

Alabama (We dare defend our rights) , anthem = "Alabama (state song), Alabama" , image_map = Alabama in United States.svg , seat = Montgomery, Alabama, Montgomery , LargestCity = Huntsville, Alabama, Huntsville , LargestCounty = Baldwin County, Al ...

) by Ehret & Harrell (2018). * A series of neck vertebrae of ''Pteranodon'' associated with a tooth of the

lamniform The Lamniformes (, from Greek ''lamna'' "fish of prey") are an order of sharks commonly known as mackerel sharks (which may also refer specifically to the family Lamnidae). It includes some of the most familiar species of sharks, such as the gre ...

shark ''

Cretoxyrhina ''Cretoxyrhina'' (; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous. The type species, ''C. mantelli'', is m ...

mantelli'' is described from the

Niobrara Formation The Niobrara Formation , also called the Niobrara Chalk, is a geologic formation in North America that was deposited between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian stages of the Late Cretaceous. It is compose ...

(

) by Hone, Witton & Habib (2018), who interpret the specimen as evidence of ''Cretoxyrhina'' biting ''Pteranodon''. * A mawsoniid coelacanth specimen is described from

Rhaetian The Rhaetian is the latest age of the Triassic Period (in geochronology) or the uppermost stage of the Triassic System (in chronostratigraphy). It was preceded by the Norian and succeeded by the Hettangian (the lowermost stage or earliest age ...

deposits of the

Var Department Var (, ) is a department in the Provence-Alpes-Côte d'Azur region of Southeastern France. It takes its name from the river Var, which flowed along its eastern boundary, until the boundary was moved in 1860 and the department is no longer associ ...

(

) by Deesri ''et al.'' (2018), representing the first known coelacanth from the marine

of France. * A study on both newly collected and earlier fossil material of '' Ventalepis ketleriensis'' from the

(

) of

Latvia Latvia ( or ; lv, Latvija ; ltg, Latveja; liv, Leţmō), officially the Republic of Latvia ( lv, Latvijas Republika, links=no, ltg, Latvejas Republika, links=no, liv, Leţmō Vabāmō, links=no), is a country in the Baltic region of ...

and central and northwestern

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

is published by Lebedev & Lukševičs (2018), who interpret the fossils as supporting the

porolepiform Porolepiformes is an Order (biology), order of prehistoric lobe-finned fish which lived during the Devonian geological period, period (about 416 to 359 million years ago). The group contains two family (biology), families: Holoptychiidae and Poro ...

affinities of this species, and name a new family Ventalepididae. * Anatomical description of the endocast of ''" Chirodipterus" australis'' from the Upper

Gogo Formation (

) is published by Henderson & Challands (2018). * A revision of the

lungfish Lungfish are freshwater vertebrates belonging to the order Dipnoi. Lungfish are best known for retaining ancestral characteristics within the Osteichthyes, including the ability to breathe air, and ancestral structures within Sarcopterygii, i ...

remains from the

of the Świętokrzyskie Mountains and from the northeastern

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

is published by Skrzycki, Niedźwiedzki & Tałanda (2018), who report the first known

finding of ''

Arganodus ''Arganodus'' is an extinct genus of Ceratodontidae (lungfish). Its fossils have been found in the Redonda Formation, New Mexico, the Tacuarembó Formation of Uruguay, and the Cumnock Formation, North Carolina, although the North Carolinian s ...

'' worldwide and the oldest known occurrence of '' Ptychoceratodus'' in Europe. * Lungfish burrows are reported for the first time from the Lower and Middle Triassic deposits of the Southern Cis-Urals by Sennikov (2018). * A study on the anatomy of the

Mioceratodus ''Mioceratodus'' is an extinct genus of lungfish in the family Neoceratodontidae, which also contains the extant Queensland lungfish.Consequences of Traumatic injury in Fossil and Recent Dipnoan Dentitions. Kemp, A. Journal of Vertebrate Paleont ...

gregoryi'' from the

Redbank Plains Formation (

) is published by Kemp (2018). * Description of well-preserved pelvic fin skeleton of a specimen of ''

Rhizodus ''Rhizodus'' (root tooth) is an extinct genus of basal, finned tetrapodomorphs (the group of sarcopterygians that contains modern tetrapods and their extinct relatives). It belonged to Rhizodontida, one of the earliest-diverging tetrapodomorph c ...

hibberti'' from the

(

Viséan The Visean, Viséan or Visian is an age in the ICS geologic timescale or a stage in the stratigraphic column. It is the second stage of the Mississippian, the lower subsystem of the Carboniferous. The Visean lasted from to Ma. It follows the ...

) Asbian Wardie Shales (

) is published by Jeffery ''et al.'' (2018). * A rediagnosis and redescription of ''

Hyneria ''Hyneria'' is a genus of large prehistoric predatory lobe-finned fish which lived in freshwater during the Devonian period around 360 million years ago. Etymology The genus name ''Hyneria'' is a reference to the village of Hyner, Pennsylvania, ...

lindae'' based on new remains from the Catskill Formation (

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

Research

New taxa

Jawless vertebrates

Placoderms

Acanthodians

Cartilaginous fishes

Ray-finned fishes

Lobe-finned fishes

References