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Sclerorhynchoidea
Sclerorhynchoidei is an extinct suborder of rajiform rays that had long rostra with large denticles similar to sawfishes and sawsharks. This feature was convergently evolved and their closest living relatives are actually skates. While they are often called "sawfishes", sawskates is a more accurate common name for sclerorhynchoids. The suborder contains five named families: Ganopristidae, Ischyrhizidae, Onchopristidae, Ptychotrygonidae, and Schizorhizidae. Several genera (see below) are not currently placed in any of these families. Sclerorhynchoids first appeared in the Barremian and went extinct during the Cretaceous–Paleogene extinction event, with former Paleocene occurrences being misidentifications or reworked specimens. Phylogeny Below is a cladogram of Sclerorhynchoidei, with the topology based on Villalobos-Segura ''et al.'' (2021b) and the family taxonomy based on Greenfield (2021). Other genera *†''Agaleorhynchus'' *†''Ankistrorhynchus'' *†''Arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batoidea
Batoidea is a superorder of cartilaginous fishes, commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces. Anatomy Batoids are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batoids have five ventral slot-like body openings called gill slits that lead from the gills, but the Hexatrygonidae have six. Batoid gill slits lie under the pectoral fins on the underside, whereas a shark's are on the sides of the head. Most batoids have a flat, disk-like body, with the exception of the guitarfishes and sawfishes, while most sharks have a spindle-shaped body. Many species of batoid have developed their pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barremian
The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 129.4 ± 1.5 Ma (million years ago) and 121.4 ± 1.0 Ma). It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series). It is preceded by the Hauterivian and followed by the Aptian Stage.See Gradstein ''et al.'' (2004) or the online geowhen database (link below) Stratigraphic definitions The original type locality for the Barremian Stage is in the vicinity of the village of Barrême, Alpes-de-Haute-Provence, France. Henri Coquand defined the stage and named it in 1873. The base of the Barremian is determined by the first appearance of the ammonites ''Spitidiscus hugii'' and ''Spitidiscus vandeckii''. The end of the Barremian is determined by the geomagnetic reversal at the start of the M0r chronozone, which is biologically near the first appearance of the ammonite '' Paradeshayesites oglanlensis''. Regional equivalents The Barremian falls in the Gallic epoch, a su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Name
In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often contrasted with the scientific name for the same organism, which is Latinized. A common name is sometimes frequently used, but that is not always the case. In chemistry, IUPAC defines a common name as one that, although it unambiguously defines a chemical, does not follow the current systematic naming convention, such as acetone, systematically 2-propanone, while a vernacular name describes one used in a lab, trade or industry that does not unambiguously describe a single chemical, such as copper sulfate, which may refer to either copper(I) sulfate or copper(II) sulfate. Sometimes common names are created by authorities on one particular subject, in an attempt to make it possible for members of the general public (including such interested par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biropristis
''Biropristis'' is an extinct genus of sawfish-like shark from the Late Cretaceous epoch of the Cretaceous period. The genus is named in honor of Dr. Lajos Biró-Bagózcky who studied the formation in which it was found. It is known from a single species, ''B. landbecki''. It is known solely from isolated oral teeth found in the Maastrichtian-aged Quiriquina Formation of central Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a .... The species is named for Luis Landbeck who found the first fossils at the locality in which it was found. References {{Taxonbar, from=Q100906118 Prehistoric cartilaginous fish genera Sclerorhynchidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baharipristis
''Baharipristis'' is an extinct genus of sawfish-like shark from the Cretaceous period. It contains a singular species, ''B. bastetiae''. It was described from the Cenomanian-aged Bahariya formation of Gebel Ghorabi, Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Mediter ... based on distinctive isolated rostral teeth. It shares the formation with at least 9 other genera of Sclerorhynchid Saw-snouted sharks. References Sclerorhynchidae Prehistoric cartilaginous fish genera {{paleo-cartilaginous-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australopristis
''Australopristis'' is an extinct genus of sawfish from the late Cretaceous epoch. Its name is derived from the Latin for "southern" and the Greek for "saw". It is known from a single species, ''A. wiffeni'' named for the late prominent fossil hunter Joan Wiffen. This species is currently known only from rostral teeth found at Mangahouanga stream and East Wing, Haumuri bluff, New Zealand. It's rostral teeth possess a smooth root which makes it unique among Sclerorhynchids. Rostral teeth appear to vary in morphology according to position and ontogenetic stage. Unlike the related ''Onchopristis'' and '' Atlanticopristis'', it lives in a marine rather than fluvial In geography and geology, fluvial processes are associated with rivers and streams and the deposits and landforms created by them. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term glaciofluvial or fluviog ... environment and likely preferred cooler waters. References {{Taxon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlanticopristis
''Atlanticopristis'' (meaning "Atlantic saw") is an extinct genus of sclerorhynchid (a sawfish-like chondrichthyan) that lived during the Middle Cretaceous (Cenomanian) of what is now the Northeast Region of Brazil, between 100.5 and 93.9 million years ago. Fourteen fossil teeth from ''Atlanticopristis'' were found in the Alcântara Formation, and referred to the closely related ''Onchopristis'' in 2007; a redescription in 2008 by Brazilian paleontologists Manuel Medeiros and Agostinha Pereira assigned it to a new genus containing one species, ''Atlanticopristis equatorialis.'' Like all sawfish, it would have had a long snout armed with modified fish scales shaped into "teeth", but ''Atlanticopristis's'' teeth had barbs on both sides. ''Atlanticopristis'' inhabited fresh to brackish water estuaries near large conifer forests, and lived in the same time and place as many species of bony fish, cartilaginous fish, and lobe finned fish, as well as some crocodilians, and several di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archingeayia
''Archingeayia'' is an extinct genus of sawfish-like shark from the Cretaceous period. The name is derived from the type locale of the type species: Archingeay−Les Nouillers, France. This genus is known currently by isolated oral teeth alone from a singular species, ''A. sistaci''. The specific epithet honors geologist Paul Sistac. This species was described from the lower Cenomanian of 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 ....Wueringer, B. E., Squire, L., & Collin, S. P. (2009). The biology of extinct and extant sawfish (Batoidea: Sclerorhynchidae and Pristidae). ''Reviews in Fish Biology and Fisheries'', ''19''(4), 445. References Sclerorhynchidae Prehistoric cartilaginous fish genera {{Paleo-shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankistrorhynchus
''Ankistrorhynchus'' is an extinct genus of sawfish-like shark from the Cretaceous Period. It is known only isolated rostral teeth from two species. ''A. lonzeensis'' is named for its type locality of Lonzée, Belgium. It is from the lower Santonian stage. ''A. washakiensis'' was described from the Campanian-aged Mesaverde Formation of Wyoming, USA. The species ''A. major'' was named from Campanian/Santonian of New Jersey, USA New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware R ... off of fragmentary material, thus making its validity questionable. References {{Taxonbar, from=Q100906728 Sclerorhynchidae Fossil taxa described in 1964 Prehistoric cartilaginous fish genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agaleorhynchus
''Agaleorhynchus'' is an extinct genus of Sclerorhynchidae from the Cretaceous period. It is named after Professor Andy Gale, in recognition of his work on Cretaceous chalk stratigraphy. It is known from a single species, ''A. britannicus'', which is currently restricted to the middle Santonian to early Campanian of southern England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b .... References {{Taxonbar, from=Q104856811 Cretaceous cartilaginous fish Sclerorhynchidae Prehistoric cartilaginous fish genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sclerorhynchus
''Sclerorhynchus'' (from el, σκληρός , 'hard' and el, ῥύγχος 'snout') is an extinct genus of ganopristid sclerorhynchoid that lived during the Late Cretaceous. The genus ''Ganopristis'' is considered a junior synonym of ''Sclerorhynchus''. It was a widespread genus, with fossils found in the Middle East (''S. atavus'', ''S. karakensis''), North Africa (''S. leptodon''), Europe (''S. leptodon''), and North America (''S. fanninensis'', ''S. pettersi'', ''S. priscus''). While it had a long rostrum with large denticles similar to sawfishes and sawshark A sawshark or saw shark is a member of a shark order (Pristiophoriformes ) bearing a unique long, saw-like Rostrum (anatomy), rostrum (snout or bill) edged with sharp teeth, which they use to slash and disable their prey. There are eight species ...s, its closest living relatives are actually skates. Complete specimens of ''S. atavus'' show that its fin arrangement was similar to skates, with the pectoral and pel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micropristis
''Micropristis'' is an extinct genus of ganopristid sclerorhynchoid that lived in the Middle East and Europe during the 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 .... References Cretaceous cartilaginous fish Cretaceous fish of Europe Prehistoric cartilaginous fish genera {{paleo-cartilaginous-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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