Loc. 2399 - Ferrotepec Fm (Miocene of Mexico)

Where: Michoacan, Mexico (18.0° N, 103.6° W: paleocoordinates 18.6° N, 101.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Ferrotepec Formation, Middle Miocene (16.0 - 11.6 Ma)

• LITHOSTRATIGRAPHIC RELATIONS: From Ferrotepac Fm, which has unknown lithostratigraphic relationships. AGE: Middle Miocene. Justification for biostratigraphic assignment unknown.

• group of beds-level stratigraphic resolution

Environment/lithology: shoreface; lithified sandstone and lithified siltstone

• ENVIRONMENT: Unknown, but probably shallow marine. Environmental designation is based on collections entered by S. Peters.
• SPECIFIC LITHOLOGY: Unknown, but assumed to be similar to collections previously entered by S. Peters. LITHIFICATION: Lithified, on the basis of figured specimens (all embedded in matrix).

Preservation: original aragonite, original calcite

Collected by Perrilliat

Collection methods: surface (in situ),

• COLLECTOR: M. D. Perrilliat (1980's). REPOSITORY: Instituto de Geologia, Universidad Nacional Autonoma de Mexico (IGM).

Primary reference: M. C. Perrilliat. 1992. Bivalvos y gasterópodos de la formacion Ferrotepec (Mioceno Medio) de Michoacan. Paleontologia Mexicana 60:1-48 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 76566: authorized by Austin Hendy, entered by Austin Hendy on 23.11.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Exhaustive for mollusca (gastropoda, bivalvia, and scaphopoda). NOMENCLATURE: Authoritative publication, with modern nomenclature, and extensive use of subspecific, and subgenus assignments.
Bivalvia
 Arcida - Arcidae
 Pectinida - Pectinoidae
Pecten (Pecten) mexicanus Perrilliat 1992 scallop
 Pholadida - Corbulidae
Caryocorbula prenasuta Olsson 1964 clam
SUBSPECIES: C. prenasuta mexicana
 Pholadida - Pholadidae
Martesia sp. Sowerby 1824 clam
 Cardiida - Mactridae
Harvella cf. sincola Olsson 1922 clam
 Cardiida - Veneridae
Lirophora (Lirophora) falconensis Hodson et al. 1927 venus clam
Pitar sp. Römer 1857 venus clam
Clementia (Clementia) dariena Conrad 1855 venus clam
SUBSPECIES: C. (C.) dariena dariena
Cyclinella cyclica Guppy 1866 venus clam
 Cardiida - Tellinidae
Psammacoma zapotalensis Spieker 1922 tellin clam
Psammacoma gatunensis Toula 1909 tellin clam
 Lucinida - Lucinidae
 Protobranchia - Nuculanidae
Saccella cf. fabalis Olsson 1964 pointed nut clam
Gastropoda
 Neogastropoda - Mitridae
Mitra (Atrimitra) sp. Dall 1918 mitre shell
 Neogastropoda - Conidae
Conus aemulator Brown and Pilsbry 1911 cone shell
SUBSPECIES: C. aemulator michoacanensis
 Naticoidea - Naticidae
Sinum sp. Röding 1798 moon snail
 Cypraeoidea - Cypraeidae
Muracypraea sp. Woodring 1957 cowry
 Tonnoidea - Personidae
"Distorsio (Rhysema) decussata" = Distorsio decussata
"Distorsio (Rhysema) decussata" = Distorsio decussata Valenciennes 1832 snail
 Truncatelloidea - Tornidae