San Martín Atexcal tracksite, Level I (Cretaceous of Mexico)

Where: Puebla, Mexico (18.4° N, 97.7° W: paleocoordinates 16.9° N, 54.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: San Juan Raya Formation, Aptian (125.0 - 113.0 Ma)

• upper part of formation; 6 track-bearing levels

• bed-level stratigraphic resolution

Environment/lithology: lagoonal; gray shale and fine-grained, medium, brown sandstone

• "mudflat"; "a shallow lagoonal, tidal-flat setting, between reefs and the coast line"
• "originally registered on grayish shale; however, these are mostly preserved as convex hyporeliefs in brownish, fine to medium-grained sandstone layers"

Size class: macrofossils

Preservation: cast, trace

Collection methods: surface (in situ),

Primary reference: R. A. Rodríguez-de la Rosa, M. C. Aguillón-Martínez, and J. López-Espinoza. 2004. The fossil record of vertebrate tracks in Mexico. Ichnos 11:27-37 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 143830: authorized by Matthew Carrano, entered by Matthew Carrano on 26.04.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda -
Theropoda indet., Allosauroidea indet.
Theropoda indet. Marsh 1881 theropod
ATRM-3, 4, 5
Allosauroidea indet. Currie and Zhao 1994 allosauroid
ATRM-A, B, C
 Ornithischia - Iguanodontidae
Iguanodontidae indet.
Iguanodontidae indet. Bonaparte 1850 iguanodontid
ATRM-1, 2