Quebrada Yerbas Buenas, Atacama (Jurassic of Chile)

Where: Chile (27.1° S, 69.6° W: paleocoordinates 29.4° S, 31.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Obtusum (196.5 - 189.6 Ma)

• ammonoid zone: details given for trigonioids only

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithology not reported

Size class: macrofossils

Preservation: mold/impression, original calcite, replaced with silica

Collection methods: mechanical, acetic,

• collected since 1966

Primary reference: M. Aberhan. 1994. Early Jurassic Bivalvia of northern Chile. Part I. Subclasses Palaeotaxodonta, Pteriomorphia, and Isofilibranchia. Beringeria 13:3-115 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 95102: authorized by Martin Aberhan, entered by Sabine Nürnberg on 06.04.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• bivalves only
 Pectinida - Limidae
Pseudolimea duplicata, "Ctenostreon wrighti" = Ctenostreon rugosum
Pseudolimea duplicata Sowerby 1814 file clam
"Ctenostreon wrighti" = Ctenostreon rugosum Smith 1817 file clam
 Pectinida - Plicatulidae
 Ostreida - Gryphaeidae
 Ostreida - Palaeolophidae
 Pholadida - Ceratomyidae
Gresslya "sp. A"1 Agassiz 1843 clam
 Pholadomyida - Pholadomyidae
Pholadomya (Pholadomya) idea1 d'Orbigny 1850 clam
 Trigoniida - Myophorelloidae
Quadratojaworskiella acarinata n. sp.2 Pérez et al. 2008 clam