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Xinpusaurus: Difference between revisions

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'''''Xinpusaurus''''' is an extinct [[genus]] of [[thalattosaur]] [[marine reptile]]s from the [[Late Triassic]] of [[Guanling]] in [[Guizhou, China]]. Three species have been named since 2000: the [[type species]] ''X. suni'' and the species ''X. bamaolinensis'' and ''X. kohi''. A recent study proposed that all three species are [[synonym (taxonomy)|synonymous]] with each other, in which case ''X. suni'' would be the only valid species.<ref name=LJ13>{{cite journal |last=Liu |first=J. |year=2013 |title=On the taxonomy of ''Xinpusaurus'' (Reptilia: Thalattosauria) |journal=Vertebrata PalAsiatica |volume=51 |issue=1 |pages=17-23 |url=http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/201301/P020130131404692609056.pdf}}</ref> ''Xinpusaurus'' is characterized by short legs, a long tail, and an upturned snout. It had robust, pointed teeth in the front of its jaws and broad crushing teeth in the back of its jaws, suggesting that it fed on hard-shelled prey.<ref name=LZLH13>{{cite doi|10.1666/12-059R1.1}}</ref>
 
==Relationships==
A [[phylogenetic]] analysis of thalattosaurs published in 2013 found ''[[Concavispina]]'' to be the closest relative of ''Xinpusaurus''. Below is a [[cladogram]] based on that analysis:<ref name=LZLH13/>
 
{{clade| style=font-size:100%;line-height:85%
|label1=[[Diapsida]]
|1={{clade
|1=''[[Petrolacosaurus kansensis]]''
|2={{clade
|1=''[[Youngina capensis]]''
|2={{clade
|1=''[[Prolacerta broomi]]''
|label2=[[Thalattosauria]]
|2={{clade
|label1=[[Askeptosauroidea]]
|1={{clade
|1=''[[Miodentosaurus brevis]]''
|2={{clade
|1=''[[Endennasaurus acutirostris]]''
|2={{clade
|1=''[[Anshunsaurus huangguoshuensis]]''
|2=''[[Anshunsaurus wushaensis]]''
|3=''[[Askeptosaurus italicus]]''}} }} }}
|label2=[[Thalattosauroidea]]
|2={{clade
|1=''[[Paralonectes merriami]]''
|2={{clade
|1={{clade
|1=''[[Concavispina biseridens]]''
|2='''''Xinpusaurus suni'''''}}
|2={{clade
|1=''[[Clarazia schinzi]]''
|2={{clade
|1=''[[Hescheleria ruebeli]]''
|2={{clade
|1={{clade
|1=''[[Agkistrognathus campebelli]]''
|2=''[[Nectosaurus halius]]''}}
|2={{clade
|1=''[[Thalattosaurus alexandrae]]''
|2=''[[Thalattosaurus borealis]]''
}} }} }} }} }} }} }} }} }} }} }}
 
==References==