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Rebbanasaurus . It was relatively small, with a skull estimated at long. It is generally considered to be a relatively basal sphenodontian that lies outside Eusphenodontia.
Cladogram following Sues and Schoch, 2023:
''Rebbanasaurus'' is an extinct sphenodontian reptile known from remains found in the Early-Middle Jurassic Kota Formation of India. The type specimen is a partial jawbone which has acrodont teeth, with other known remains including fragments of the premaxilla, maxilla, and 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. References {{Taxonbar, from=Q28432033 Rhynchocephalia[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphenodontian
Rhynchocephalia (; ) is an order (biology), 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 mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neosphenodontia
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 groups ... [...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] |
Godavarisaurus
''Godavarisaurus'' is an extinct genus of sphenodontian reptile from the Early-Middle Jurassic Kota Formation of Andhra Pradesh, India. It is known from jaw fragments (including the maxilla, premaxilla, and parts of the dentary). It was a small sphenodontian, with the skull estimated to be less than long. It is generally considered to be a relatively basal sphenodontian that lies outside Eusphenodontia. Cladogram following Sues and Schoch, 2023: See also * Rhynchocephalia 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 g ... References Rhynchocephalia Jurassic lepidosaurs Extinct animals of India Prehistoric reptile genera {{paleo-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clevosaurus
''Clevosaurus'' (meaning "Gloucester lizard") is an extinct genus of rhynchocephalian reptile from the Late Triassic and the Early Jurassic periods. Species of ''Clevosaurus'' were widespread across Pangaea, and have been found on all continents except Australia and Antarctica. Five species of ''Clevosaurus'' have been found in ancient fissure fill deposits in south-west England and Wales, alongside other sphenodontians, early mammals and dinosaurs. In regards to its Pangaean distribution, ''C. hadroprodon'' is the oldest record of a sphenodontian from Gondwana, though its affinity to ''Clevosaurus'' has been questioned. History of discovery The first species of ''Clevosaurus'' to be described was ''C. hudsoni'', which was described by William Elgin Swinton in 1939 from a fissure fill deposit in Cromhall Quarry ( Magnesian Conglomerate Formation) in the county of Gloucestershire, England, with the name of the county lending its name to the genus. Another notable specimen was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthiamimus
''Opisthiamimus'' () is an extinct genus of small-bodied eusphenodontian rhynchocephalian from the Upper Jurassic Morrison Formation of Northern Wyoming, United States. The type species, ''O. gregori'', is known from four specimens, which together preserve a nearly complete skeleton. It is amongst the smallest known rhynchocephalians, with a skull length of and a snout–vent length (the length from the tip of the snout to the cloaca A cloaca ( ), : cloacae ( or ), or vent, is the rear orifice that serves as the only opening for the digestive (rectum), reproductive, and urinary tracts (if present) of many vertebrate animals. All amphibians, reptiles, birds, cartilagin ...) of around . The genus was described in 2022 by David DeMar, Marc E. H. Jones, and Matthew Carrano. It was found that it was only distantly related to '' Eilenodon'', '' Theretairus'' and '' Opisthias,'' the other known rhynchocephalians from the Morrison Formation''.'' Phylogeny Cladogram following ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polysphenodon
''Polysphenodon'' is an extinct genus of sphenodontian reptile with a single species ''Polysphenodon mulleri'' from the Late Triassic Keuper Group of Germany.N. C. Fraser and M. J. Benton. (1989) The Triassic reptiles '' Brachyrhinodon'' and ''Polysphenodon'' and the relationships of the sphenodontids. ''Zoological Journal of the Linnean Society'' 96:413-445 History of discovery The genus and only known species ''Polysphenodon mulleri'' was described by Otto Jaekel in 1911''.Jaekel, O (1911) Die Wierbeltiere. Eine Übersicht über diefossilen und lebenden Formen. ''Borntraeger, Berlin'', 252p Polysphenodon mulleri'' is known from a single partial skeleton recovered from a borehole sample at depth, which includes parts of the skull, limbs and tail vertebrae. This specimen has been lost since the 1930s, but is known from several casts. Description The skull was around long in life. The snout is relatively short, even when accounting for post-mortem distortion. The limbs ... [...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] |
Theretairus
''Theretairus'' is a Late Jurassic genus of sphenodont reptile from the Morrison Formation of western North America,Foster, J. (2007). "Table 2.1: Fossil Vertebrates of the Morrison Formation." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. Indiana University Press. pp. 58-59. present in stratigraphic zones 5 and 6.Foster, J. (2007). "Appendix." ''Jurassic West: The Dinosaurs of the Morrison Formation and Their World''. Indiana University Press. pp. 327-329. History and naming The holotype consists of a right mandible and several in-socket teeth from Quarry 9 at Como Bluff, Wyoming where it was excavated by paleontologist William Harlow Reed, who then was working for Othniel Charles Marsh, and it was deposited at the Yale Peabody Museum under YPM VP 13764. The locality comes from strata of the Brushy Basin Member of the Morrison Formation, which also bears other sphenodontians '' Opisthias'' and '' Eilenodon.''Rasmussen, T. E.; Callison, George ( ... [...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] |
Planocephalosaurus
''Planocephalosaurus'' is an extinct genus of basal rhynchocephalian. Fossils of the genus are primarily known from fissure fill deposits from the Late Triassic of southwest Britain, with fragmentary remains possibly belonging to the genus also known from the Late Triassic of Texas. Taxonomy The genus and the type species ''P. robinsonae'' was described in 1982 by Fraser from remains found in fissure fill deposits in Gloucestershire in southwest Britain. In 2004, a second species ''P. lucasi'' was described from remains found in the Tecovas Formation in Texas.Heckert, A. B. 2004. Late Triassic microvertebrates from the lower Chinle Group (Otischalkian-Adamanian: Carnian), southwestern U.S.A. New Mexico Museum of Natural History & Science Bulletin 27:1–170. ''P. robinsonae'' is known from disarticulated remains covering most of the skeleton,'','' while ''P. lucasi'' is known from fragments of the jaws. While originally classified in Sphenodontidae, later studies have placed it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
