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Microsphenodon
''Microsphenodon'' is an extinct genus of Sphenodontia, sphenodontian from the Late Triassic of Brazil. The type species is ''Microsphenodon bonapartei''. It is a small sphenodontian with a skull roughly 20 mm long, and represents a unique mosaic of characteristics shared by both early diverging sphenodontians (such as a broad parietal table, multiple tooth rows on the palate, and an elongated premaxillary process) and eusphenodontian characters (full acrodont dentition, high coronoid process and anterior successional teeth, including the earliest known caniniforms in a lepidosaur). Specimens of this taxon were first identified by Bonaparte and Sues (2006) but were misidentified as juvenile ''Clevosaurus brasiliensis'', characteristics such as differences in the configuration of the teeth on the palate, and the unique form of tooth implantation seen in ''C. brasiliensis'', helped differentiate these two co-occurring sphenodontian taxa. Cladogram following Chambi-Trowell ''et al.' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleollanosaurus
''Paleollanosaurus'' is an extinct genus of sphenodontian reptile that lived during the Late Triassic. The type species ''P. fraseri'' was described from a jaw fragment found in West Texas in North America. Remains have also been reported from Switzerland. It is generally considered a basal sphenodontian. Cladogram following Chambi-Trowell ''et al.'', 2021. References {{Taxonbar, from=Q111716115 Reptiles described in 2004 Late Triassic animals of Europe Rhynchocephalia Prehistoric reptile genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eusphenodontia
Rhynchocephalia (; ) is an order of lizard-like reptiles that includes only one living species, the tuatara (''Sphenodon punctatus'') of New Zealand. Despite its current lack of diversity, during the Mesozoic rhynchocephalians were a speciose group with high morphological and ecological diversity. The oldest record of the group is dated to the Middle Triassic around 238 to 240 million years ago, and they had achieved global distribution by the Early Jurassic. Most rhynchocephalians belong to the group Sphenodontia ('wedge-teeth'). Their closest living relatives are lizards and snakes in the order Squamata, with the two orders being grouped together in the superorder Lepidosauria. Rhynchocephalians are distinguished from squamates by a number of traits, including the retention of rib-like gastralia bones in the belly, as well as most rhynchocephalians having acrodont teeth that are fused to the crests of the jaws (the latter also found among a small number of modern lizard group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Triassic
The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch and followed by the Early Jurassic Epoch. The corresponding series (stratigraphy), series of rock beds is known as the Upper Triassic. The Late Triassic is divided into the Carnian, Norian and Rhaetian Geologic time scale, ages. Many of the first dinosaurs evolved during the Late Triassic, including ''Plateosaurus'', ''Coelophysis'', ''Herrerasaurus'', and ''Eoraptor''. The Triassic–Jurassic extinction event began during this epoch and is one of the five major mass extinction events of the Earth. Etymology The Triassic was named in 1834 by Friedrich August von Namoh, Friedrich von Alberti, after a succession of three distinct rock layers (Greek meaning 'triad') that are widespread in southern Germany: the lower Buntsandstein (colourful ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazil
Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population, seventh-largest by population, with over 212 million people. The country is a federation composed of 26 Federative units of Brazil, states and a Federal District (Brazil), Federal District, which hosts the capital, Brasília. List of cities in Brazil by population, Its most populous city is São Paulo, followed by Rio de Janeiro. Brazil has the most Portuguese-speaking countries, Portuguese speakers in the world and is the only country in the Americas where Portuguese language, Portuguese is an Portuguese-speaking world, official language. Bounded by the Atlantic Ocean on the east, Brazil has a Coastline of Brazil, coastline of . Covering roughly half of South America's land area, it Borders of Brazil, borders all other countries and ter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gephyrosaurus
Gephyrosaurus is an extinct genus of lepidosaurian reptile known from the Late Triassic to Early Jurassic of the United Kingdom. It is generally considered to be one of the most primitive members of the clade Rhynchocephalia. Description ''Gephyrosaurus bridensis'' was relatively small in size, with a skull around long, wide and deep. The skull of ''Gephyrosaurus bridensis'' lacks a complete temporal bar, with a gap between the jugal and quadrate bones. Unlike more advanced rhynchocephalians belonging to Sphenodontia, ''Gephyrosaurus bridensis'' retains a lacrimal bone in the skull, though it is considerably reduced in size compared to more primitive reptiles. The frontal and parietal bones are unpaired. Each half of the upper and lower jaws have around 35-40 teeth.Evans, S.E. 1980. The skull of a new eosuchian reptile from the Lower Jurassic of South Wales. ''Zoological Journal of the Linnean Society'' 70: 203–264. Unlike other known rhynchocephalians, all of these te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penegephyrosaurus
''Penegephyrosaurus'' is an extinct genus of early rhynchocephalian from the Late Triassic of the United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan .... It contains a single species, ''Penegephyrosaurus curtiscoppi''. It is only known from a partial lower jaw. It is considered one of the most basal known rhynchocephalians and is placed as part of the family Gephyrosauridae. References Rhynchocephalia Prehistoric reptile genera {{paleo-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wirtembergia ) as well as limb ...
''Wirtembergia'' is an extinct genus of rhynchocephalian reptile known from the Middle Triassic (Ladinian) of Germany. It is the earliest known rhynchocephalian. History of discovery The first remains of the genus were reported in 2013 as cf. '' Diphydontosaurus'' based on two lower jaws found in the Middle Triassic (Ladinian) Erfurt Formation, located in the state of Baden-Württemberg near the settlement of Vellberg. In 2023, the genus and species ''Wirtembergia hauboldae'' was described based on this material, as well as a partial skeleton (SMNS 91313) found at the same locality, including parts of the skull (the premaxilla, maxilla, jugal, frontal, pterygoid, and a possible partial palatine A palatine or palatinus (Latin; : ''palatini''; cf. derivative spellings below) is a high-level official attached to imperial or royal courts in Europe since Roman Empire, Roman times. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diphydontosaurus
''Diphydontosaurus'' is an extinct genus of small Rhynchocephalia, rhynchocephalian reptile from the Late Triassic of Europe. It is the most primitive known member of Sphenodontia. Description ''Diphydontosaurus'' was one of the smallest sphenodontia, sphenodontians, measuring up to long. It had long, sharp claws to help it catch its prey. The skull, which was around long, had large Orbit (anatomy), orbits (eye sockets), as well as a combination of 17 regularly replaced conical pleurodont teeth on the front of the jaws and 11 larger permanent acrodont teeth in the posterior jaws. It was likely an insectivore which used its acrodont posterior teeth to dismember prey. Classification ''Diphydontosaurus avonis'' is known from abundant remains covering most of the skeleton found in fissure fill deposits in Southwest Britain. A skeleton of a juvenile sphenodontian tentatively referred to ''Diphydontosaurus'' was reported in 1996 from the Norian of Lombardy in Italy.Renesto, S., 1995 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
