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Archosauriforms
Archosauriformes (Greek for 'ruling lizards', and Latin for 'form') is a clade of diapsid reptiles encompassing archosaurs and some of their close relatives. It was defined by Jacques Gauthier (1994) as the clade stemming from the last common ancestor of Proterosuchidae and Archosauria. Phil Senter (2005) defined it as the most exclusive clade containing '' Proterosuchus'' and Archosauria. Gauthier as part of the ''Phylonyms'' (2020) defined the clade as the last common ancestor of '' Gallus'', ''Alligator'', and '' Proterosuchus'', and all its descendants. Archosauriforms are a branch of archosauromorphs which originated in the Late Permian (roughly 252 million years ago) and persist to the present day as the two surviving archosaur groups: crocodilians and birds. Archosauriforms present several traits historically ascribed to the group Archosauria. These include serrated teeth set in deep sockets, a more active metabolism, and an antorbital fenestra (a hole in the skull in fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Permian
Late or LATE may refer to: Everyday usage * Tardy, or late, not being on time * Late (or the late) may refer to a person who is dead Music * ''Late'' (The 77s album), 2000 * Late (Alvin Batiste album), 1993 * Late!, a pseudonym used by Dave Grohl on his '' Pocketwatch'' album * Late (rapper), an underground rapper from Wolverhampton * "Late", a song by Kanye West from ''Late Registration'' Other uses * Late (Tonga), an uninhabited volcanic island southwest of Vavau in the kingdom of Tonga * "Late" (''The Handmaid's Tale''), a television episode * LaTe, Oy Laivateollisuus Ab, a defunct shipbuilding company * Limbic-predominant age-related TDP-43 encephalopathy, a proposed form of dementia * Local-authority trading enterprise, a New Zealand business law * Local average treatment effect, a concept in econometrics * Late, a synonym for ''cooler'' in stellar classification See also * * * ''Lates'', a genus of fish in the lates perch family * Later (other) Later may ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eorasaurus
''Eorasaurus'' is an extinct genus of archosauromorph reptile known from the middle late Permian (late Capitanian or early Wuchiapingian age) of Tatarstan, European Russia. It contains a single species, ''Eorasaurus olsoni''. When originally described by Sennikov (1997), ''Eorasaurus'' was identified as an early archosauromorph and assigned to the family Protorosauridae, Ezcurra ''et al.'' (2014) and Ezcurra (2016) later reclassified ''Eorasaurus'' and placed it within the group Archosauriformes. ''Eorasaurus'' is based solely on scant fossil material from the neck region, and is thus considered an unstable taxon in phylogenetic analyses. If ''Eorasaurus'' is an archosauriform, it would be the oldest known member of the group and would pre-date the previous record holder (the proterosuchid '' Archosaurus''). Discovery ''Eorasaurus'' was named by Andrey G. Sennikov in 1997. It is known from four specimens representing a single individual, PIN 156/108 through PIN 156/111. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protopyknosia
Protopyknosia is an extinct clade of archosauriform reptiles from the Late Triassic of India and the United States. First identified by Sterling Nesbitt ''et al.'' in 2021, the clade contains two genera: '' Kranosaura'' and '' Triopticus''. Members of Protopyknosia characteristically have an unusually domed head reminiscent of the later pachycephalosaurian dinosaurs in an example of convergent evolution. The clade was defined by Nesbitt ''et al.'' 2021 as the "most inclusive clade containing '' Triopticus primus'', but not ''Passer domesticus'' (the house sparrow), ''Triceratops horridus'', '' Alligator mississippiensis'' (the American alligator), ''Sphenodon punctatus'' (the tuatara), ''Heloderma suspectum'' (the Gila monster), or ''Chrysemys picta The painted turtle (''Chrysemys picta'') is the most widespread native turtle of North America. It lives in relatively slow-moving fresh waters, from southern Canada to northern Mexico, and from the Atlantic to the Pacific. They ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erythrosuchidae
Erythrosuchidae (meaning "red crocodiles" in Greek) are a family of large basal archosauriform carnivores that lived from the later Early Triassic (Olenekian) to the early Middle Triassic (Anisian). Naming The family Erythrosuchidae was named by David Meredith Seares Watson in 1917.D.M.S. Watson. 1917. "A sketch classification of the Pre-Jurassic tetrapod vertebrates". ''Proceedings of the Zoological Society of London'' 1917: 167–186 Description They were the apex predators of their day, with lengths of to almost . Their fossil remains are known to date from South Africa ( Beaufort Group of the Karoo Basin), China, India and European Russia, from the Early to Middle Triassic. Erythrosuchids were unusually large and robust archosauromorphs. Several features set them apart from other archosauriformes and are also seen in later, more derived archosaurs. For example, they lack teeth on the palate, which are found in other early archosauriformes, such as '' Doswellia'' and eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proterosuchidae
Proterosuchidae is an early family of basal archosauriforms whose fossils are known from the Late Permian and the Early Triassic. The highest diversity of genera is known from European Russia, but fossils are also known from South Africa, India, China, Australia, Brazil and possibly Argentina. The name comes from Greek πρότερο- ("first") and σοῦχος ("crocodile"). Description They were slender, medium-sized (about long, largest specimens reached ), long-snouted and superficially crocodile-like animals, although they lacked the armoured scutes of true crocodiles, and their skeletal features are much more primitive. The limbs are short and indicate a sprawling posture, like contemporary lizards but unlike most later archosaurs. Their most characteristic feature is a distinct down-turning of the premaxilla (the front of the upper jaw, which overhangs the lower jaw). Evolutionary history The terminal Permian catastrophe, which killed off 95% of all types of life, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wangisuchus
''Wangisuchus'' is an extinct genus of archosauriform reptile from the Middle Triassic of China that is known from fragmentary fossil jaw bones. These bones were found at the Hsishihwa locality in the upper Ermaying Formation, which dates to the late Anisian stage about 242 million years ago. ''Wangisuchus'' was named in 1964 by Chinese paleontologist Yang Zhongjian, who described a single species, ''Wangisuchus tzeyii'', on the basis of these bones. Classification Yang classified ''Wangisuchus'' in the family Euparkeriidae, which also includes the much better known ''Euparkeria'' from the Early Triassic of South Africa. He diagnosed ''Wangisuchus'' by the following characters: long and low shape of the maxilla; pointed posterior process of the maxilla; rounded anterior margin of the maxilla; thecodont tooth implantation; crurotarsal (crocodile-like) structure of the ankle. Later authors noted that a calcaneum, or ankle bone, referred to ''Wangisuchus'' by Yang more closely rese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vonhuenia
''Vonhuenia'' (named after Friedrich von Huene) is an extinct genus of proterosuchid, a basal archosauriform from the Early Triassic of Russia. Fossils have been found in the Vokhminskaya Formation, along the Vetluga River that are Induan in age, making ''Vonhuenia'' one of the earliest archosauriforms. Classification The type species ''V. friedrichi'', named in 1992, is based on material that was misassigned to the genus '' Chasmatosuchus'' by Ochev (1978). Although originally classified as a proterosuchid, a 2016 cladistic analysis by Ezcurra ''et al''. recovered it as a non-eucrocopodan archosauriform of uncertain position.Ezcurra, M.D. (2016),The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms. PeerJ4:e1778;DOI10.7717/peerj.1778 However, a 2023 cladistic analysis of the Proterosuchidae, again by Ezcurra ''et al.'', again recovered ''Vonhuenia'' as a proterosuchid, specifically as a basal member o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vjushkovisaurus
''Vjushkovisaurus'' is an extinct genus of Middle Triassic archosauriform. It is known from the Anisian-aged Donguz Gorizont in Sol-Iletsk, Orenburg Oblast, Russia. The genus was named in 1982, with the type species being ''V. berdjanensis''. Material has been collected in the Berdyanka II locality from a fossil assemblage called the '' Eryosuchus'' Fauna along the Berdyanka River, specifically in a sand-carbonate concretion in the upper part of the main river channel. ''Vjushkovisaurus'' is known only from the holotype PIN 2865/62 (formerly SGU 104/3871), a partial postcranial skeleton which consists of 12 presacral vertebrae, left humerus, ribs, a fragment of the coracoid and a fragment of the fibula. Description Most rauisuchids have a crest on the ilium called the supra- acetabular process that overlies the head of the femur, allowing them to have a "pillar-erect" stance. As an early rauisuchid ''Vjushkovisaurus'' lacks this crest, but it does have a small thick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vigilosaurus
''Vigilosaurus'' is an extinct genus of archosauriform reptile from the Permian-aged Guodikeng Formation of Xinjiang Xinjiang,; , SASM/GNC romanization, SASM/GNC: Chinese postal romanization, previously romanized as Sinkiang, officially the Xinjiang Uygur Autonomous Region (XUAR), is an Autonomous regions of China, autonomous region of the China, People' ..., China. It contains a single species, ''V. gaochangensis.'' References Archosauriformes Permian reptiles of Asia Permian China Prehistoric reptile genera Fossil taxa described in 2022 {{paleo-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uatchitodon
''Uatchitodon'' is an extinct genus of Late Triassic reptile known only from isolated teeth. Based on the structure of the teeth, ''Uatchitodon'' was probably a carnivorous archosauromorph. Folded grooves on the teeth indicate that the animal was likely venomous, with the grooves being channels for salivary venom. The teeth are similar to those of living venomous squamates such as ''Heloderma'' and venomous snakes. ''Uatchitodon'' is the earliest known venomous reptile. Description and species The genus was first named with the description of the type species ''U. kroehleri'' by Hans-Dieter Sues in the journal ''Nature (journal), Nature'' in 1991. ''U. kroehleri'' is known from several teeth found from the early middle Carnian Turkey Branch Formation of the Newark Supergroup in Virginia, uncovered from the Tomahawk locality. The teeth average around 10 mm in length. The tooth crown is strongly Anatomical terms of location#Teeth, labiolingually compressed, recurved, and serr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
