Bajada del Agrio, Shell Bed A, Neuquen, Argentina (Cretaceous of Argentina)

Where: Argentina (38.0° S, 69.8° W: paleocoordinates 37.0° S, 32.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bajada del Agria Formation, Late/Upper Valanginian (140.2 - 136.4 Ma)

• Middle facies shell bed A, Neocomites Subzone

• bed-level stratigraphic resolution

Environment/lithology: shoreface; lithified, fine-grained, medium, yellow sandstone and lithified, gray mudstone

Size class: macrofossils

Primary reference: D. G. Lazo. 2003. Taxonomy, facies relationships and palaeobiology of bakevelliid bivalves from the Lower Cretaceous of west-central Argentina . Cretaceous Research 24(6):765-788 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 44679: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 16.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Sedentaria
 Sabellida - Serpulidae
Cephalopoda
 Ammonitida - Neocomitidae
Neocomites sp. Uhlig 1905 ammonite
Bivalvia
 Ostreida - Bakevelliidae
Gervillella aviculoides Sowerby 1814 oyster
 Ostreida - Gryphaeidae
"Aetostreon sp." = Exogyra (Aetostreon), "Amphidonte (Ceratostreon) sp." = Ceratostreon
"Aetostreon sp." = Exogyra (Aetostreon) Bayle 1878 oyster
"Amphidonte (Ceratostreon) sp." = Ceratostreon Bayle 1878 oyster
 Arcida - Cucullaeidae
 Pholadomyida - Pholadomyidae
Pholadomya gigantea Sowerby 1836 clam
 Hiatellida - Hiatellidae
 Cardiida - Veneridae
 Carditida - Astartidae
Eriphyla argentina Burckh and Weaver 1907 clam
 Trigoniida - Megatrigonioidae
Pterotrigonia (Rutitrigonia) coihuicoensis clam
Pterotrigonia (R.) coihuicoensis
 Trigoniida - Myophorelloidae
 Trigoniida - Trigoniidae