{{Short description|Extinct genus of reptile}} {{Speciesbox | fossil_range = {{Geological_age|Norian|Rhaetian}} | genus = Paleollanosaurus | parent_authority = Heckert, 2004 | species = fraseri | authority = Heckert, 2004 }}

'''''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.<ref>A. B. Heckert. 2004. [https://books.google.com/books?id=T2cfCgAAQBAJ&dq=Paleollanosaurus&pg=PP1 Late Triassic microvertebrates from the lower Chinle Group (Otischalkian-Adamanian: Carnian), southwestern U.S.A.] New Mexico Museum of Natural History and Science Bulletin 27:1-170</ref> Remains have also been reported from Switzerland.<ref>{{Cite journal |last1=Whiteside |first1=David I. |last2=Duffin |first2=Christopher J. |last3=Furrer |first3=Heinz |date=2017-07-01 |title=The Late Triassic lepidosaur fauna from Hallau, North-Eastern Switzerland, and a new 'basal' rhynchocephalian Deltadectes elvetica gen. et sp. nov. |url=http://www.schweizerbart.de/papers/njgpa/detail/285/87648/The_Late_Triassic_lepidosaur_fauna_from_Hallau_Nor?af=crossref |journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen |language=en |volume=285 |issue=1 |pages=53–74 |doi=10.1127/njgpa/2017/0669 |issn=0077-7749|url-access=subscription }}</ref> It is generally considered a basal sphenodontian. Cladogram following Chambi-Trowell ''et al.'', 2021.<ref name=":0">{{Cite journal |last1=Chambi-Trowell |first1=Sofia A. V. |last2=Martinelli |first2=Agustín G. |last3=Whiteside |first3=David I. |last4=Vivar |first4=Paulo R. Romo de |last5=Soares |first5=Marina Bento |last6=Schultz |first6=Cesar L. |last7=Gill |first7=Pamela G. |last8=Benton |first8=Michael J. |last9=Rayfield |first9=Emily J. |date=2021-06-03 |title=The diversity of Triassic South American sphenodontians: a new basal form, clevosaurs, and a revision of rhynchocephalian phylogeny |journal=Journal of Systematic Palaeontology |volume=19 |issue=11 |pages=787–820 |doi=10.1080/14772019.2021.1976292 |issn=1477-2019 |s2cid=240487298 |doi-access=free |hdl-access=free |hdl=1983/af14affc-a26e-426b-83ca-e1833e355882}}</ref>

{{clade|{{clade |1=''Gephyrosaurus'' |2={{clade |1=''Penegephyrosaurus'' |label2=Sphenodontia |2={{clade |1=''Paleollanosaurus'' |2=Vellberg rhynchocephalian |3=''Diphydontosaurus'' |label4=Acrosphenodontia |4={{clade |1=''Planocephalosaurus'' |2={{clade |1=''Godavarisaurus'' |2={{clade |1=''Polysphenodon'' |2={{clade |1=''Microsphenodon'' |2=Eusphenodontia }}}}}}}}}}}}}}|label1=Rhynchocephalia}}

== References == {{Reflist}}

{{Taxonbar|from=Q111716115}}

Category:Reptiles described in 2004 Category:Late Triassic animals of Europe Category:Rhynchocephalia Category:Prehistoric reptile genera