Presa San Antonio or Rincon Colorado (Cretaceous of Mexico)

Also known as IGM 3500 or IGM 3501

Where: Coahuila, Mexico (25.3° N, 101.3° W: paleocoordinates 31.4° N, 76.0° W)

• coordinate stated in text

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

Environment/lithology: pond; lithified, gray, green mudstone

• "The formation consists of cyclic alternations of marine, estuarine and freshwater environments. The described specimens were deposited in lakes or small ponds, associated with the deltaic system…"
• Olive-grey mudstone

Size classes: macrofossils, mesofossils

Preservation: permineralized

Primary reference: P. Cifuentes-Ruiz, P. Vršanský, F. J. Vega, S. R. S. Cevallos-Ferriz, E. González-Soriano and C. R. Delgado Jesús. 2006. Campanian terrestrial arthropods from the Cerro del Pueblo Formation, Difunta Group in northeastern Mexico. Geologica Carpathica 57(5):347-354 [M. Clapham/J. Karr/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 119500: authorized by Matthew Clapham, entered by Jered Karr on 28.10.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Arachnida
 Araneae -
Opisthothelae indet.
Opisthothelae indet. Pocock 1892 spider
IGM 8825
Insecta
 Blattodea - Blattulidae
Xonpepetla rinconensis n. gen. n. sp.
Xonpepetla rinconensis n. gen. n. sp. Cifuentes-Ruiz and Vršanský 2006 cockroach
IGM 8827, 8828
 Odonata -
? Anisoptera indet.
? Anisoptera indet. Selys-Longchamps and Hagen 1854 true dragonfly
IGM 8826