Miquihuana7-3 (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: black, gray, calcareous shale
• massive, hard shale, ferruginous, spheroidal weathering, grading downward into marly and silty shales; basal conglomerate present; angular unconformity at base
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 2131: authorized by Mark Patzkowsky, entered by Karen Layou on 22.06.1999
Creative Commons license: CC0 (CC0)
Taxonomic list
Show authors, comments, and common names
| Bivalvia | |
|
Gryphaea sp. Lamarck 1801 oyster
Exogyra tamaulipana Imlay 1937 oyster
"Exogyra putnami" = Aetostreon subsinuatum Leymerie 1842 oyster
Exogyra reedi Imlay 1937 oyster | |
|
Cucullaea sp. Lamarck 1801 clam | |
| Gastropoda | |
|
Vermetus sp. Daudin 1800 worm shell | |