Sierra Santa Rosa, Section 4 (Jurassic of Mexico)

Where: Sonora, Mexico (30.7° N, 112.6° W: paleocoordinates 17.6° N, 55.2° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Middle Member (Sierra Santa Rosa Formation), Sinemurian (199.3 - 190.8 Ma)

• Sinemurian-Pliensbachian?

• member-level stratigraphic resolution

Environment/lithology: marine; mudstone and calcareous sandstone

Size class: macrofossils

Preservation: mold/impression

Primary reference: S. E. Damborenea and C. M. González-León. 1997. Late Triassic and Early Jurassic bivalves from Sonora, Mexico. Revista Mexicana de Ciencias Geológicas 14(2):178-201 [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40177: authorized by Martin Aberhan, entered by Sabine Nürnberg on 19.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Entoliidae
Entolium disciforme Schubler 1833 scallop
 Pectinida - Neitheoidae
Weyla alata von Buch 1838 scallop
 Ostreida - Pinnidae
Pinna sp. Linnaeus 1758 oyster
 Mytilida - Mytilidae
Falcimytilus sp. Cox 1937 mussel
 Pholadida - Ceratomyidae
Ceratomya sp. Sandberger 1864 clam
 Cardiida - Kalenteridae
Myoconcha neuquena Leanza 1940 clam
 Pandorida - Laternulidae
Platymyoidea indet. Cox 1964 clam
originally entered as "Platymyoidea sp."
 Pholadomyida - Pholadomyidae
"Pholadomya cf. fidicula" = Pholadomya (Pholadomya) fidicula Sowerby 1826 clam
Pholadomya cf. ambigua Sowerby 1819 clam
? Pachymya sp. Sowerby 1826 clam