Parrishia

Parrishia Temporal range: Late Triassic 221.5–205.6 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Genus:	†Parrishia Long and Murry, 1995
Type species
†P. mccreai Long and Murry, 1995

Parrishia is an extinct genus of sphenosuchian crocodylomorph known from the Late Triassic Chinle, Dockum, and Santa Rosa Formations in Arizona and New Mexico.

Discovery and naming

The genus was named in 1995 from fossils found from the Placerias quarry of the Chinle Group in Apache County, Arizona.^[1] It was named after the paleontologist J. Michael Parrish, with the type species being P. mccreai. Parrishia was distinguished from the closely related genus Hesperosuchus on the basis of more robust vertebral centra and the lack of dorsoventrally offset articular faces of the cervical centra, thus causing the neck to be straight rather than anterodorsally curved as in Hesperosuchus.^[1]

In their description of a new crocodylomorph skeleton from the famous Whitaker quarry in Ghost Ranch, Clark et al. (2000) treated Parrishia as a nomen dubium because they considered the holotype and referred specimens undiagnostic.^[2] More complete postcranial skeletons such as PEFO 26681 have been found that clearly show that the cervical centra of Parrishia possess articular faces that are dorsoventrally offset as in Hesperosuchus.^[3] Additionally, in the holotype specimen (UCMP A269/139623) the anterior surfaces of the centa are positioned more dorsally than the posterior surfaces, giving the neck an anterodorsal curve like Hesperosuchus.^[2][4] Therefore, the only distinguishing character that distinguishes Parrishia from Hesperosuchus is the robustness of the vertebrae.^[3] Material from Parrishia cannot be assigned to any other known sphenosuchian genus because of the lack of postcranial apomorphies; as a result, it is considered an indeterminate genus.^[5]

In an SVP 2018 conference abstract, William Parker and colleagues reported the discovery of new specimens indicating that Parrishia represents a phytosaur and not a crocodylomorph.^[6]

References

• v
• t
• e

Pseudosuchia

Kingdom: Animalia Phylum: Chordata Class: Sauropsida Clade: Archosauria
Sauropsida see Sauropsida Archosauromorpha see Archosauromorpha Pseudosuchia see below↓

Pseudosuchia
Pseudosuchia †Dasygnathoides †Nundasuchus †Phytosauria? †Ornithosuchidae Aenigmaspina? Dynamosuchus Ornithosuchus Riojasuchus Venaticosuchus Suchia †Heteropelta? †Koilamasuchus? †Mandasuchus †Nundasuchus? †Ticinosuchus †Erpetosuchidae Archeopelta? Dyoplax? Erpetosuchus Pagosvenator Parringtonia Tarjadia †Aetosauriformes Acaenasuchus Euscolosuchus Revueltosaurus Aetosauria see Aetosauria †Gracilisuchidae Gracilisuchus Maehary? Turfanosuchus Yonghesuchus Paracrocodylomorpha see below↓

Paracrocodylomorpha
Paracrocodylomorpha †Mambawakale †Poposauroidea Lotosaurus Schultzsuchus? Qianosuchus Ctenosauriscidae Arizonasaurus Bromsgroveia Bystrowisuchus Ctenosauriscus Hypselorhachis Tsylmosuchus? Xilousuchus Poposauridae Dolichobrachium Poposaurus Shuvosauridae Effigia Shuvosaurus Sillosuchus Loricata †Apatosuchus †Arganasuchus †Batrachotomus †Dagasuchus †Decuriasuchus †Etjosuchus †Fasolasuchus †Heptasuchus †Heteropelta? †Incertovenator? †Luperosuchus †Mandasuchus? †Prestosuchus †Procerosuchus †Saurosuchus †Stagonosuchus †Youngosuchus †Rauisuchidae Arganasuchus? Energosuchus? Jushatyria? Polonosuchus Postosuchus Procerosuchus? Rauisuchus Scolotosuchus Scythosuchus? Teratosaurus Tikisuchus? Vivaron Vjushkovisaurus? Vytshegdosuchus? Crocodylomorpha see below↓

Crocodylomorpha
Crocodylomorpha †Carnufex †Dibothrosuchus †Dromicosuchus †Hesperosuchus †Heteropelta? †Junggarsuchus †Kayentasuchus †Parrishia †Phyllodontosuchus †Pseudhesperosuchus †Redondavenator †Sphenosuchus †Syntomiprosopus? †Trialestes †Saltoposuchidae Litargosuchus Saltoposuchus Terrestrisuchus †Hallopodidae Almadasuchus Hallopus Macelognathus †Thalattosuchia see Thalattosuchia Crocodyliformes †Entradasuchus †Eopneumatosuchus †Kemkemia †Microchampsa †Platyognathus †Stegomosuchus †Tagarosuchus †Protosuchidae Coloradisuchus Dianosuchus Edentosuchus Erythrochampsa Hemiprotosuchus Hoplosuchus Orthosuchus? Pedeticosaurus? Protosuchus †Notochampsidae Notochampsa Orthosuchus? †Gobiosuchidae Cassissuchus Gobiosuchus Lisboasaurus? Zaraasuchus Mesoeucrocodylia †Dianchungosaurus †Hsisosuchus †Induszalim †Lusitanisuchus †Neuquensuchus †Pachycheilosuchus? †Titanochampsa †Thalattosuchia? †Shartegosuchoidea Hadongsuchus Shantungosuchus Sichuanosuchus Zosuchus Shartegosuchidae Adzhosuchus Fruitachampsa Kyasuchus Nominosuchus Shartegosuchus Metasuchia †Ziphosuchia see Ziphosuchia includes notosuchians Neosuchia see Neosuchia includes crocodilians

• See also: Rauisuchia
• Prestosuchidae
• Bathyotica
• Sphenosuchia
• Protosuchia
• Mesosuchia
• Category

This article about a prehistoric archosaur is a stub. You can help Wikipedia by expanding it.

• v
• t
• e