Arroyo San Lazaro8 (Cretaceous of Mexico)
Where: Nuevo Leon, Mexico (25.8° N, 99.6° W)
• Paleocoordinates: 21.6° N, 40.1° W (Wright 2013)
• coordinate based on political unit
• small collection-level geographic resolution
When: Valanginian (137.1 - 132.6 Ma)
Environment/lithology: limestone
• limestone, thin-bedded, nodular-veined and fractured, dense, blue-grey; some thin interbedded ashy and shaly marls; ammonites abundant, esp. Rogersites and Thurmannites
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 2133: 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
| Cephalopoda | |
Valanginites tijerensis, "Rogersites prorsiradiatus" = Olcostephanus atherstoni, "Rogersites tenuicostatus" = Olcostephanus atherstoni, "Rogersites filifer" = Olcostephanus atherstoni, "Rogersites bakeri" = Olcostephanus atherstoni, "Rogersites paucicostatus" = Olcostephanus paucicostatus, "Rogersites sanlazarensis" = Olcostephanus sanlazarensis
Valanginites tijerensis Imlay 1937 ammonite
"Rogersites prorsiradiatus" = Olcostephanus atherstoni Sharpe 1856 ammonite
"Rogersites tenuicostatus" = Olcostephanus atherstoni Sharpe 1856 ammonite
"Rogersites filifer" = Olcostephanus atherstoni Sharpe 1856 ammonite
"Rogersites bakeri" = Olcostephanus atherstoni Sharpe 1856 ammonite
"Rogersites paucicostatus" = Olcostephanus paucicostatus Imlay 1937 ammonite
"Rogersites sanlazarensis" = Olcostephanus sanlazarensis Imlay 1937 ammonite | |
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Thurmannites angusticostatus Imlay 1937 ammonite
Favrella sp. Douvillé 1909 ammonite | |
| Bivalvia | |
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