JP-93407 - Loma San Juan, western Huetamo area (Cretaceous of Mexico)

Where: Michoacan, Mexico (18.5° N, 100.9° W: paleocoordinates 17.7° N, 58.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Cumburindio Formation, Aptian (125.0 - 113.0 Ma)

• Upper biostrome, approximately 20 m above JP-93406

• member-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone and lithified sandstone

• at least 4 rudist biostromes
• biostromic rudist limestone, sandstone and argillaceous siltstone

Size class: macrofossils

Primary reference: G. Alencaster and J. Pantoja-Alor. 1996. The rudist Amphitriscoelus (Bivalvia-Hippuritacea) in the lower Cretaceous of southwestern Mexico. Journal of Paleontology 70(3):399-407 [A. Miller/S. Kolbe]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 115203: authorized by Arnold Miller, entered by Sarah Kolbe on 30.08.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Hippuritida - Caprinuloideidae
Amphitriscoelus waringi, Amphitriscoelus pluriloculata
Amphitriscoelus waringi Harris and Hodson 1922 rudist
Amphitriscoelus pluriloculata Alencaster and Pantoja-Alor 1996 rudist
Gastropoda
 Heterostropha - Nerineidae
Nerineidae indet.
Nerineidae indet. Zittel 1873 snail
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
Demospongea
  -
"Demospongea indet." = Demospongiae
"Demospongea indet." = Demospongiae Sollas 1875 demosponge