Dvinosaurs are one of several new clades of temnospondyls named in the phylogenetic review of the group by Yates and Warren 2000. They represent a group of primitive semi-aquatic to completely aquatic temnospondyls, and are known from the Late Carboniferous to the Early Triassic, being most common in the Permian period. Their distinguishing characteristics are a reduction of the otic notch; the loss of a flange on the rear side of the pterygoid; and 28 or more presacral vertebrae.
Trimerorhachidae is the most basal family of dvinosaurs. Most other dvinosaurs are placed in the superfamily Dvinosauroidea. Within Dvinosauroidea are two families, Eobrachyopidae and Tupilakosauridae, as well as dvinosaurs that cannot be placed in either family, such as Dvinosaurus and Kourerpeton. A 2008 phylogenetic analysis found Eobrachyopidae to be paraphyletic, representing a grade of basal dvinosauroids. Below is a cladogram showing the phylogenetic relationships of dvinosaurs from Englehorn et al. (2008):[2]
^Werneburg, R.; Schneider, J. W.; Lucas, S. G. (2021). "The new dvinosaurian Bermanerpeton kinneyi (Temnospondyli), with "branchiosaurid" characters, from the Late Pennsylvanian Kinney Brick Quarry in New Mexico". New Mexico Museum of Natural History and Science Bulletin. 84: 433–451.
^Englehorn, J.; Small, B.J.; Huttenlocker, A. (2008). "A redescription of Acroplous vorax (Temnospondyli: Dvinosauria) based on new specimens from the Early Permian of Nebraska and Kansas, U.S.A.". Journal of Vertebrate Paleontology. 28 (2): 291–305. doi:10.1671/0272-4634(2008)28[291:AROAVT]2.0.CO;2.
Yates, A. M., and Warren A. A., 2000, The phylogeny of the ‘higher’ temnospondyls (Vertebrata: Choanata) and its implications for the monophly and origins of the Stereospondyli: Zoological Journal of the Linnean Society, v. 128, p. 77-121.
External linksedit
at Palaeos
at Mikko's Phylogeny Archive (cladogram based on Yates and Warren 2000)
Suborder †Dvinosauria - Scientific Hierarchy at the Taxonomicon
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dvinosauria, confused, with, dinosaur, dvinosaurs, several, clades, temnospondyls, named, phylogenetic, review, group, yates, warren, 2000, they, represent, group, primitive, semi, aquatic, completely, aquatic, temnospondyls, known, from, late, carboniferous, . Not to be confused with Dinosaur Dvinosaurs are one of several new clades of temnospondyls named in the phylogenetic review of the group by Yates and Warren 2000 They represent a group of primitive semi aquatic to completely aquatic temnospondyls and are known from the Late Carboniferous to the Early Triassic being most common in the Permian period Their distinguishing characteristics are a reduction of the otic notch the loss of a flange on the rear side of the pterygoid and 28 or more presacral vertebrae DvinosauriaTemporal range Late Carboniferous Early Triassic 279 5 251 3 Ma PreꞒ Ꞓ O S D C P T J K Pg NDvinosaurus primusScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataOrder TemnospondyliSuborder DvinosauriaYates and Warren 2000Subgroups Trimerorhachidae Perryella Timonya Trypanognathus Dvinosauroidea Acroplous Bermanerpeton 1 Dvinosaurus Erpetosaurus Isodectes Kourerpeton TupilakosauridaeTrimerorhachidae is the most basal family of dvinosaurs Most other dvinosaurs are placed in the superfamily Dvinosauroidea Within Dvinosauroidea are two families Eobrachyopidae and Tupilakosauridae as well as dvinosaurs that cannot be placed in either family such as Dvinosaurus and Kourerpeton A 2008 phylogenetic analysis found Eobrachyopidae to be paraphyletic representing a grade of basal dvinosauroids Below is a cladogram showing the phylogenetic relationships of dvinosaurs from Englehorn et al 2008 2 Dvinosauria Trimerorhachidae TrimerorhachisNeldasaurusPerryella Dvinosauroidea Isodectes Eobrachyopidae Acroplous Eobrachyopidae DvinosauridaeKourerpetidae Tupilakosauridae SlaugenhopiaTupilakosaurusThabanchuiaReferences edit Werneburg R Schneider J W Lucas S G 2021 The new dvinosaurian Bermanerpeton kinneyi Temnospondyli with branchiosaurid characters from the Late Pennsylvanian Kinney Brick Quarry in New Mexico New Mexico Museum of Natural History and Science Bulletin 84 433 451 Englehorn J Small B J Huttenlocker A 2008 A redescription of Acroplous vorax Temnospondyli Dvinosauria based on new specimens from the Early Permian of Nebraska and Kansas U S A Journal of Vertebrate Paleontology 28 2 291 305 doi 10 1671 0272 4634 2008 28 291 AROAVT 2 0 CO 2 Laurin M and Steyer J S 2000 Phylogeny and Apomorphies of Temnospondyls permanent dead link The Tree of Life Web Project Yates A M and Warren A A 2000 The phylogeny of the higher temnospondyls Vertebrata Choanata and its implications for the monophly and origins of the Stereospondyli Zoological Journal of the Linnean Society v 128 p 77 121 External links editTemnospondyli Limnarchia at Palaeos Dvinosauria at Mikko s Phylogeny Archive cladogram based on Yates and Warren 2000 Suborder Dvinosauria Scientific Hierarchy at the Taxonomicon nbsp This Temnospondyli related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Dvinosauria amp oldid 1213383482, wikipedia, wiki, book, books, library,
