Quebrada Chanchoquin, Atacama (Jurassic of Chile)

Where: Chile (28.8° S, 70.3° W: paleocoordinates 31.3° S, 31.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Late/Upper Sinemurian (196.5 - 189.6 Ma)

• 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 95071: authorized by Martin Aberhan, entered by Sabine Nürnberg on 06.04.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ostreida - Gryphaeidae
 Ostreida - Palaeolophidae
 Pholadomyida - Pholadomyidae
Pholadomya (Pholadomya) idea1 d'Orbigny 1850 clam
 Trigoniida - Groeberellidae
Groeberella neuquensis3 Groeber 1924 clam
 Trochoidea - Trochidae
Lithotrochus humboldtii2 von Buch 1839 top snail
fragments, juvenile