Brachyrhinodon and its single species B. taylori originally described in 1910 by German paleontologist Friedrich von Huene based on three specimens found near Elgin, Scotland where a number of reptile fossils (collectively dubbed the "Elgin Reptiles") have been found. The species was later redescribed in 1989 based on 12 specimens, representing at least 10 individuals. The specimens are largely preserved as negative moulds within the sandstone, which meant that casts needed to be made for description.[1]
Descriptionedit
Skull diagram in side-on and top-down views
Brachyrhinodon is known from remains covering most of the skeleton. The skull of Brachyrhinodon is around 2.5 centimetres (0.98 in) long. The skull is relatively blunt. The front of the upper jaw overhangs the front of the lower jaw. The teeth are conical. The postcranial skeleton is similar to that of other sphenodontians.[1]
Taxonomyedit
Brachyrhinodon is considered to be a member of Eusphenodontia. Some studies have recovered it as closely related to Clevosaurus, placing both genera as part of the family Clevosauridae,[2][3] with some studies finding B. taylori nested within Clevosaurus.[3] Other studies have recovered Brachyrhinodon as unrelated to Clevosaurus.[4]
^ abFraser, N. C.; Benton, M. J. (August 1989). "The Triassic reptiles Brachyrhinodon and Polysphenodon and the relationships of the sphenodontids". Zoological Journal of the Linnean Society. 96 (4): 413–445. doi:10.1111/j.1096-3642.1989.tb02521.x.
^Herrera-Flores, Jorge A.; Stubbs, Thomas L.; Elsler, Armin; Benton, Michael J. (2018-04-06). "Taxonomic reassessment of Clevosaurus latidens Fraser, 1993 (Lepidosauria, Rhynchocephalia) and rhynchocephalian phylogeny based on parsimony and Bayesian inference". Journal of Paleontology. 92 (4): 734–742. doi:10.1017/jpa.2017.136. ISSN 0022-3360.
^ abChambi-Trowell, Sofia A. V.; Martinelli, Agustín G.; Whiteside, David I.; Vivar, Paulo R. Romo de; Soares, Marina Bento; Schultz, Cesar L.; Gill, Pamela G.; Benton, Michael J.; Rayfield, Emily J. (2021-06-03). "The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny". Journal of Systematic Palaeontology. 19 (11): 787–820. doi:10.1080/14772019.2021.1976292. hdl:1983/af14affc-a26e-426b-83ca-e1833e355882. ISSN 1477-2019.
^DeMar, David G.; Jones, Marc E. H.; Carrano, Matthew T. (2022-12-31). "A nearly complete skeleton of a new eusphenodontian from the Upper Jurassic Morrison Formation, Wyoming, USA, provides insight into the evolution and diversity of Rhynchocephalia (Reptilia: Lepidosauria)". Journal of Systematic Palaeontology. 20 (1): 1–64. doi:10.1080/14772019.2022.2093139. hdl:2440/136608. ISSN 1477-2019. S2CID 252325953.
^M.J. Benton, A.D. Walker Palaeoecology, taphonomy and dating of Permo-Triassic reptiles from Elgin, north-east Scotland Palaeontology, 28 (1985), pp. 207-234
brachyrhinodon, meaning, short, nose, tooth, extinct, genus, sphenodontian, from, late, triassic, lossiemouth, sandstone, scotland, temporal, range, late, triassic, preꞒ, nscientific, classificationkingdom, animaliaphylum, chordataclass, reptiliaorder, sphenod. Brachyrhinodon meaning short nose tooth is an extinct genus of sphenodontian from the Late Triassic Lossiemouth Sandstone of Scotland BrachyrhinodonTemporal range Late Triassic 237 227 Ma PreꞒ Ꞓ O S D C P T J K Pg NScientific classificationKingdom AnimaliaPhylum ChordataClass ReptiliaOrder SphenodontiaFamily Clevosauridae Genus BrachyrhinodonHuene 1910Type speciesBrachyrhinodon tayloriHuene 1910 Contents 1 History of discovery 2 Description 3 Taxonomy 4 Ecology 5 ReferencesHistory of discovery editBrachyrhinodon and its single species B taylori originally described in 1910 by German paleontologist Friedrich von Huene based on three specimens found near Elgin Scotland where a number of reptile fossils collectively dubbed the Elgin Reptiles have been found The species was later redescribed in 1989 based on 12 specimens representing at least 10 individuals The specimens are largely preserved as negative moulds within the sandstone which meant that casts needed to be made for description 1 Description edit nbsp Skull diagram in side on and top down viewsBrachyrhinodon is known from remains covering most of the skeleton The skull of Brachyrhinodon is around 2 5 centimetres 0 98 in long The skull is relatively blunt The front of the upper jaw overhangs the front of the lower jaw The teeth are conical The postcranial skeleton is similar to that of other sphenodontians 1 Taxonomy editBrachyrhinodon is considered to be a member of Eusphenodontia Some studies have recovered it as closely related to Clevosaurus placing both genera as part of the family Clevosauridae 2 3 with some studies finding B taylori nested within Clevosaurus 3 Other studies have recovered Brachyrhinodon as unrelated to Clevosaurus 4 Ecology editA 1985 paper suggested an omnivorous diet 5 nbsp Life restorationReferences edit a b Fraser N C Benton M J August 1989 The Triassic reptiles Brachyrhinodon and Polysphenodon and the relationships of the sphenodontids Zoological Journal of the Linnean Society 96 4 413 445 doi 10 1111 j 1096 3642 1989 tb02521 x Herrera Flores Jorge A Stubbs Thomas L Elsler Armin Benton Michael J 2018 04 06 Taxonomic reassessment of Clevosaurus latidens Fraser 1993 Lepidosauria Rhynchocephalia and rhynchocephalian phylogeny based on parsimony and Bayesian inference Journal of Paleontology 92 4 734 742 doi 10 1017 jpa 2017 136 ISSN 0022 3360 a b Chambi Trowell Sofia A V Martinelli Agustin G Whiteside David I Vivar Paulo R Romo de Soares Marina Bento Schultz Cesar L Gill Pamela G Benton Michael J Rayfield Emily J 2021 06 03 The diversity of Triassic South American sphenodontians a new basal form clevosaurs and a revision of rhynchocephalian phylogeny Journal of Systematic Palaeontology 19 11 787 820 doi 10 1080 14772019 2021 1976292 hdl 1983 af14affc a26e 426b 83ca e1833e355882 ISSN 1477 2019 DeMar David G Jones Marc E H Carrano Matthew T 2022 12 31 A nearly complete skeleton of a new eusphenodontian from the Upper Jurassic Morrison Formation Wyoming USA provides insight into the evolution and diversity of Rhynchocephalia Reptilia Lepidosauria Journal of Systematic Palaeontology 20 1 1 64 doi 10 1080 14772019 2022 2093139 hdl 2440 136608 ISSN 1477 2019 S2CID 252325953 M J Benton A D Walker Palaeoecology taphonomy and dating of Permo Triassic reptiles from Elgin north east Scotland Palaeontology 28 1985 pp 207 234 nbsp Paleontology portal nbsp This article about a Triassic reptile is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Brachyrhinodon amp oldid 1216628369, wikipedia, wiki, book, books, library,
