2 miles east of Tanners Crossing (Triassic of the United States)

Also known as Machaeroprosopus holotype

Where: Coconino County, Arizona (35.9° N, 111.3° W)

• Paleocoordinates: 11.6° N, 38.7° W (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Petrified Forest Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• Long & Murry (1995: 3) noted that this locality was "high in the Petrified Forest Member"

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Mehl & Schwartz in 1914

Collection methods: quarrying, surface (in situ),

Primary reference: M. G. Mehl. 1916. New or little known phytosaurs from Arizona. University of Oklahoma Bulletin 103:5-28 [R. Butler/R. Butler/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 93552: authorized by Richard Butler, entered by Richard Butler on 22.01.2010

Creative Commons license: CC0 (CC0)

Taxonomic list

Reptilia
 Phytosauria - Parasuchidae
Machaeroprosopus validus n. gen. n. sp. Mehl 1916 archosaur
UW 3807, skull and jaws (holotype, specimen lost). UW 3808, 3809, posterior skulls (specimens lost)
? Angistorhinus sp. Mehl 1913 archosaur
UW 3810, right jaw ramus