PM2-Eastern Coahuila (Cretaceous of Mexico)
Where: Coahuila, Mexico (27.0° N, 102.0° W: paleocoordinates 24.3° N, 54.7° W)
• small collection-level geographic resolution
When: Menchaca Limestone Member, Valanginian (139.8 - 132.9 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: limestone
• dk. blue-black limestone in beds averaging 18 inches in thickness, the lower part contains white calcite replaced Exogyras, namely E. reedi and E. putnami
Preservation: replaced with calcite
Primary reference: R. W. Imlay. 1940. Neocomian Faunas of Northern Mexico. Geological Society America Bulletin 51(1):117-190 [M. Patzkowsky/K. Layou/A. Clement]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 2149: authorized by Mark Patzkowsky, entered by Karen Layou on 23.06.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
Bivalvia | |
Exogyra reedi, "Exogyra putnami" = Aetostreon subsinuatum
Exogyra reedi Imlay 1937 oyster
"Exogyra putnami" = Aetostreon subsinuatum Leymerie 1842 oyster |