Miquihuana8-4 (Cretaceous of Mexico)

Where: Tamaulipas, Mexico (23.6° N, 99.8° W)

• Paleocoordinates: 19.5° N, 41.0° W (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Valanginian (137.1 - 132.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: limestone and shale

• limestone, thin-bedded to shaly, lt. grey; marly and silty shales

Preservation: original calcite

Primary reference: R. W. Imlay. 1937. Lower Neocomian fossils from the Miquihuana region, Mexico. Journal of Paleontology 11(7):552-574 [M. Patzkowsky/K. Layou/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 2132: authorized by Mark Patzkowsky, entered by Karen Layou on 22.06.1999, edited by Austin Hendy

Creative Commons license: CC0 (CC0)

Taxonomic list

Cephalopoda
 Ammonitida - Olcostephanidae
"Olcostephanus filifer" = Olcostephanus atherstoni
"Olcostephanus filifer" = Olcostephanus atherstoni Sharpe 1856 ammonite
"R. filfer" - originally entered as "Rogersites aff. R. filfer"
 Ammonitida - Neocomitidae
Thurmannites novihispanicus Imlay 1937 ammonite
Bivalvia
 Ostreida - Gryphaeidae
"Exogyra putnami" = Aetostreon subsinuatum Leymerie 1842 oyster
Exogyra reedi Imlay 1937 oyster