Reptile Evolution
 
Tetrapoda
Basal Tetrapoda
Reptilomorpha
Lepospondyli
 
Reptilia/Amniota
Gephyrostegus
 
Archosauromorpha
Basal Archosauromorpha
Protosynapsida
Synapsida
Mammalia
Protodiapsida
Diapsida
Terrestrial Younginiformes
Marine Younginiformes
Enaliosauria
Protorosauria
Archosauriformes
Archosauria
Dinosauria
 
Lepidosauromorpha
Urumqia clade
Cephalerpeton clade
Captorhinidae
Milleretta Limnoscelis clade
Bolosaurus Diadectes clade
Turtle Pareiasaur clade
Lanthanosuchia
Owenettidae
Lepidosauriformes
Lepidosauria
Tritosauria
Fenestrasauria • Pterosauria
Protosquamata
Squamata
 
PIMUZ-A-III-0192
 
Psilotrach

Psilotrachelosaurus toeplitschi (Nopcsa 1928, Rieppel 1993; Middle Triassic) was originally considered the sister taxon of the Serpianosaurus-Neusticosaurus (Pachypleurosaurus) clade with a relatively short humerus, ossified distal carpal and tarsal 4 and a relatively broad pubis. In the large reptile tree this taxon nests basal to all thalattosaurs + mesosaurs and the sister to Wumengosaurus + ichthyosaurs.

 

Nopcsa F 1928. Palaeontological notes on reptiles. Geologica Hungaria. Ser. Palaeontologica 1:3-84.

Rieppel O 1993. Status fo the pachypleurosoid Psilotrachelosaurus toeplitschi Nopcsa (Reptilia, Sauropterygia) from the Middle Triassic of Austria. Fieldinana (Geology) 27:1-17.

Rossmann T 2002. Studien an Mesosauriern (Amniota inc. sed., Mesosauridae): 3. Neue Aspekte zur Anatmie, Erhaltung und Paläoökologie aufgrund der Exemplare im Paläontologischen Institut der Universität Zurich. Neues Jahrbuch fur Geologie und Paläontologie, Abhandlungen 224, 197-221.

Shikama T 1966. On a reptilian skeleton from the Palaeozoic formation of San Paulo, Brazil. Transactions and Proceedings of the Palaeontological Society of Japan, New Series 64:351-358.

 
Marine Younginiformes
Galesphyrus
Claudiosaurus
 
Enaliosauria
Anarosaurus
 
Mesosauria
PIMUZ-A-III-0192
SMF R 4710
Stereosternum
Mesosaurus
 
Ichthyopterygia
Wumengosaurus
Hupehsuchus
Utatsusaurus
Ichthyosaurs
 
Thalattosauriformes
Serpianosaurus
Askeptosaurus
 
Sauropterygia
Pachypleurosaurus
Qianxisaurus
 
Placodontia
Palatodonta
Paraplacodus
 

contact: info@reptileevolution.com

Home Page