Anton Chico localities, NM (Triassic to of the United States)

Where: New Mexico (35.2° N, 105.1° W: paleocoordinates 1.8° N, 34.9° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Anton Chico Member (Moenkopi Formation), Aegean to Aegean (247.2 - 242.0 Ma)

• Laterally equivalent to the Holbrook Member of the Moenkopi Formation in Arizona, which is dated as early Anisian.

• member-level stratigraphic resolution

Environment/lithology: terrestrial; siliciclastic sediments

Size classes: macrofossils, mesofossils

Reposited in the NMMNH

Primary reference: R. R. Schoch, S. Nesbitt, J. Müller, S. G. Lucas, and J. A. Boy. 2010. The reptile assemblage from the Moenkopi Formation (Middle Triassic) of New Mexico. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 255:345-369 [R. Butler/R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 135441: authorized by Richard Butler, entered by Richard Butler on 25.10.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Procolophonia - Procolophonidae
Procolophonidae indet. Lydekker 1889 parareptile
NMMNH-P 55801 (jaw fragment)
 Diapsida -
Diapsida indet. Osborn 1903 diapsid
NMMNH-P, 2 dorsal vertebrae (55671, 55789), humerus (55778)
 Eosuchia -
Archosauromorpha indet. Huene 1946 archosauromorph
NMMNH-P, proximal portions of femora (55705, 55711, 55611, 55774); distal portions of femora type A (55612); distal portions of femora type B (55705, 55711); caudal vertebrae (55588, 55667, 55783)
Archosauriformes indet. Gauthier 1986 archosauromorph
NMMNH-P, maxilla (55712, 55717); large postorbital (55687); cervical vertebrae (55646, 55723, 55736); dorsal vertebra (55674); humerus (55790); ilium (55686); pubis (55779); ischium (55657, 55768)
 Pseudosuchia -
Pseudosuchia indet. Zittel 1890 archosaur
NMMNH-P, small postorbital (55679); undetermined cranial material (55695, 55696); quadrates (55766, 55767); dorsal vertebrae (55571, 55606, 55627, 55688, 55697, 55726, 55764, 55795); caudal vertebrae (55631, 55641, 55650, 55739, 55747); scapula (55648); humerus (55644); tibia (55762); fibula (55769); calcaneum A (55602); calcaneum B (55742)
Poposauroidea "new species" Nopcsa 1923 archosaur
NMMNH-P, cervical vertebrae (55660, 55661, 55699); femora (55708, 55720, 55731); ilia (55732, 55740); ischia (55744, 55771, 55791)
 Pseudosuchia - Ctenosauriscidae
Arizonasaurus babbitti Welles 1947 archosaur
NMMNH-P, maxilla (55689, 55710); cervical vertebrae (55577, 55593, 55630, 55698, 55719, 55728, 55794); dorsal vertebrae (55606, 55688, 55697, 55739, 55793-55795); femora (55592, 55633, 55714, 55737, 55763, 55777); Ilia (55652, 55683-55685), pubes (55643, 55651), ischia (55648, 55715)