Las Aguilas (Cretaceous of Mexico)

Where: Coahuila, Mexico (25.5° N, 101.8° W: paleocoordinates 31.7° N, 76.3° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Cerro del Pueblo Formation (Difunta Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• localities are from a 35 m thick interval near the "middle" of the overall 800 m section of the formation

• member-level stratigraphic resolution

Environment/lithology: estuary or bay; calcareous mudstone

• "a vast, low-gradient embayment that experienced storm activity and cyclical changes in sea level... brackish-water... shallow water"
• Each [skeleton] is encased in calcareous mudrock

Size class: macrofossils

Preservation: trace, concretion, soft parts

Collected in 2003

Primary reference: D. Eberth, S. D. Sampson, R. A. Rodriguez-De La Rosa, M. Aguillon-Martinez, D. B. Brinkman and J. Lopez-Espinoza. 2003. Las Aguilas: an unusually rich Campanian-age vertebrate locale in southern Coahuila, Mexico. Journal of Vertebrate Paleontology 23(3):47A [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 35360: authorized by John Alroy, entered by John Alroy on 05.12.2003, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• apparently not the same as El Pelillal (see)
unclassified
  -
Mollusca indet. Linnaeus 1758
"assemblages"
Actinopteri
 Teleostei -
Teleostei indet.
"partial skull"
 Amiiformes - Amiidae
Melvius sp. Bryant 1987 bowfin
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Testudines - Compsemydidae
Compsemys sp. Leidy 1856 turtle
 Testudines - Baenidae
Neurankylus sp. Lambe 1902 turtle
"similar" to Neurankylus
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
 Neornithischia - Hadrosauridae
Lambeosaurinae indet. Parks 1923 lambeosaurine
and possibly other hadrosaurs or other dinosaurs
 Pterosauria -
Pterosauria indet. pterosaur
"small"
 Loricata -
Crocodylia indet. crocodilian
"longirostrine"
 Squamata - Varanidae
Varanidae indet. Hardwicke and Gray 1824 monitor lizard
 Squamata - Mosasauridae
Clidastes sp. Cope 1868 mosasaur