Arroyo Los Hornos, Huetamo, Bed 4, lower Cumburindio Formation, SW Mexico (Cretaceous of Mexico)

Where: Mexico (18.5° N, 101.0° W: paleocoordinates 17.3° N, 56.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lower Member (Cumburindio Formation), Early/Lower Aptian (125.5 - 122.5 Ma)

• Beds 1-7 belong to the mid-upper part of the lower member of the Cumburindio Formation, between the 3rd and 4th rudists biostromes.

• bed-level stratigraphic resolution

Environment/lithology: lagoonal; lithified sandstone

• feldspathic sandstone; with banks with oysters and serpulids

Size classes: macrofossils, microfossils

Primary reference: C. Gonzalez-Arreola, J. Pantoja-Alor, F. Oloriz, A. B. Villasenor, and P. Garcia-Barrera. 1996. Lower Aptian Ammonitina Pseudohaploceras liptoviense (Zeuschner) in the Cumburindio Formation (Southwestern Mexico). Géobios 29(1):35-43 [W. Kiessling/U. Merkel/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 64369: authorized by Wolfgang Kiessling, entered by Uta Merkel on 07.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sorbeoconcha - Naticidae
Lunatia sp. Gray 1847 moon snail
 Trigoniida - Trigoniidae
Trigonia sp. Bruguière 1789 clam
 Trigoniida - Myophorelloidae
Myophorella sp. Bayle 1878 clam
 Ammonitida - Desmoceratidae
"Pseudohaploceras liptoviense" = Pseudohaploceras liptoviensis
"Pseudohaploceras liptoviense" = Pseudohaploceras liptoviensis Zeuschner 1856 ammonite
 Orbitolinacea - Orbitolinidae