Where: Coahuila, Mexico (26.8° N, 103.2° W: paleocoordinates 33.3° N, 77.4° W)
• coordinate stated in text
• local area-level geographic resolution
When: Parras Formation, Early/Lower Campanian (83.5 - 70.6 Ma)
• Collected directly from surface exposures where they form part of the desert pavement after they weather out of the Parras Shale. Menabites (Delawarella) vanuxemi (Morton, 1830) represents the upper lower Campanian along the Gulf/Atlantic Coastal plain(s) where it co-occurs with Menabites (Delawarella) delawarensis (Young, 1963; Cobban and Kennedy, 1992b). This latter species is an index fossil for the upper lower Campanian in North America (Kennedy et al., 1992). The subgenus Menabites (Delawarella) is a zonal index for the upper lower Campanian in the Gulf/Atlantic Coastal plains.
• group of beds-level stratigraphic resolution
Environment/lithology: prodelta; lithified shale
Size class: macrofossils
Preservation: mold/impression, replaced with pyrite, replaced with limonite
Collection methods: Repository: Coleccion de Paleontologia de Coahuila (CPC) at the Museo del Desierto, Saltillo, Coahuila, Mexico
Primary reference: C. Ifrim, W. Stinnesbeck, and J. F. Ventura. 2013. An endemic cephalopod assemblage from the Lower Campanian (Late Cretaceous) Parras Shale, western Coahuila, Mexico. Journal of Paleontology 87:881-901 [M. Clapham/M. Clapham/O. Alfaro]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 171307: authorized by Matthew Clapham, entered by Matthew Clapham on 05.07.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Menabites (Delawarella) vanuxemi Morton 1830 ammonite | |
Menuites sp. Spath 1922 ammonite | |
Desmophyllites diphylloides Forbes 1846 ammonite | |
Pseudoschloenbachia (Pseudoschloenbachia) mexicana, Pseudoschloenbachia (Pseudoschloenbachia) aff. mexicana
Pseudoschloenbachia (Pseudoschloenbachia) mexicana Renz 1936 ammonite
Pseudoschloenbachia (Pseudoschloenbachia) aff. mexicana Renz 1936 ammonite | |
Tetragonites silencioensis n. sp.
Tetragonites silencioensis n. sp. Ifrim et al. 2013 ammonite | |
Nostoceratidae indet. Hyatt 1894 ammonite | |
Polyptychoceras sp. Yabe 1927 ammonite
Pseudoxybeloceras (Parasolenoceras) sp. Collignon 1969 ammonite | |
Baculites sp. Lamarck 1799 ammonite
Baculites haresi Reeside 1927 ammonite | |
Scaphites ex gr. hippocrepis DeKay 1828 ammonite | |
Hypophylloceras (Neophylloceras) arturoi n. sp. Ifrim et al. 2013 ammonite | |
Eutrephoceras irritilasi n. sp.
Eutrephoceras irritilasi n. sp. Ifrim et al. 2013 nautiloid |