Arroyo de Los Sauces-2 (Carboniferous to of Mexico)

Also known as ASI-2

Where: Oaxaca, Mexico (17.5° N, 97.1° W: paleocoordinates 15.7° S, 50.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Ixaltepec Formation, Morrowan to Morrowan (323.2 - 306.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, gray shale

• Gray shale that turns brown and yellow when weathered. At 230 m above the base of column

Size class: macrofossils

Primary reference: S. A. Quiroz-Barroso and M. Del Carmen Perrilliat. 1998. Pennsylvanian bivalves from the Ixaltepec formation, Mexico. Journal of Paleontology 72(6):1011-1024 [J. Alroy/C. Simpson/C. Simpson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 44332: authorized by John Alroy, entered by Carl Simpson on 08.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Trigoniida - Schizodidae
Schizodus cf. ulrichi
Schizodus cf. ulrichi Worthen 1890 clam
 Cardiida - Kalenteridae
Permophorus spinulosa
 Pholadomyida - Edmondiidae
Edmondia ovata
Edmondia ovata Meek and Worthen 1873 clam
 Cardiidia - Grammysiidae
Ectogrammysia prolata
Ectogrammysia prolata Hoare 1993 clam
 Pectinida - Aviculopectinidae
Aviculopecten cf. basilicus
Aviculopecten cf. basilicus Newell 1938 scallop
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily