Bed 52, Sunchubamba section (Cretaceous of Peru)

Where: Peru (7.4° S, 78.4° W: paleocoordinates 12.9° S, 50.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Albian Formation, Middle Albian (109.0 - 105.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal marl

• Marl, thin-bedded, gray, fossiliferous

Size class: macrofossils

Collected by V.E. Benavides; reposited in the AMNH

Collection methods: surface (in situ),

Primary reference: V.E. Benavides-Caceres. 1956. Cretaceous system in northern Peru. Bulletin of the American Museum of Natural History 108(4):1-493 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 158987: authorized by Matthew Clapham, entered by Matthew Clapham on 24.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoids, bivalves, and other invertebrates groups. NOMENCLATURE: Authoritative publication, but with somewhat antiquated nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Knemiceratidae
"Knemiceras gabbi" = Glottoceras gabbi, "Knemiceras attenuatum" = Glottoceras attenuatum
"Knemiceras gabbi" = Glottoceras gabbi Hyatt 1903 ammonite
"Knemiceras attenuatum" = Glottoceras attenuatum Hyatt 1875 ammonite
Echinoidea
 Irregularia - Nucleolitidae
"Botriopygus sp." = Pygorhynchus
"Botriopygus sp." = Pygorhynchus sea urchin
 Holectypoida - Holectypidae
"Holectypus planatus" = Coenholectypus neocomiensis
"Holectypus planatus" = Coenholectypus neocomiensis Gras 1848 sea urchin
 Spatangoida - Toxasteridae
Enallaster peruanus
Enallaster peruanus heart urchin