UCLA 2372, Arroyo Santa Catarina (Paleocene of Mexico)

Where: Mexico (29.5° N, 115.3° W: paleocoordinates 33.5° N, 95.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Sepultura Formation, Selandian (61.6 - 59.2 Ma)

• Presumably from Sepultura Formation. A few feet below the base of the Tertiary lava beds capping the divide.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, concretionary, gray, calcareous sandstone

• Concretion in fine-grained gray calcareous sandstone

Size class: macrofossils

Collected by W.P. Popenoe; reposited in the LACM

• Repository: formerly UCLA

Primary reference: A. K. Miller and H. R. Downs. 1950. Tertiary nautiloids of the Americas: supplement. Journal of Paleontology 24:1-18 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 180402: authorized by Matthew Clapham, entered by Matthew Clapham on 15.07.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

 Nautilida - Hercoglossidae
Hercoglossa popenoei n. sp. Miller and Downs 1950 nautiloid