USNM806m, Cerros de los Monos (Permian of Mexico)

Also known as USNM806m, Cerros de los Monos, El Antimonio, Sonora

Where: Sonora, Mexico (30.8° N, 112.6° W: paleocoordinates 11.7° N, 40.3° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Anidanthus zone, Monos Beds Member (Antimonio Formation), Wordian (268.8 - 265.1 Ma)

• "Monos Beds"; Anidanthus zone includes two lowest zones in the succession

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary, blue limestone

• Bluish limestone containing black concretions

Size class: macrofossils

Preservation: replaced with silica

Primary reference: G. A. Cooper, C. O. Dunbar, H. Duncan, A. K. Miller, and J. B. Knight. 1953. Permian fauna at El Antimonio, western Sonora, Mexico. Smithsonian Miscellaneous Collections 119(2):1-111 [D. Bottjer/M. Clapham/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40831: authorized by David Bottjer, entered by Matthew Clapham on 01.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Foraminifera
 Fusulinoidea - Schwagerinidae
Parafusulina sp. Dunbar and Skinner 1931
unclassified
  -
Porifera indet. Grant 1836
Gastropoda
 Cyrtoneritida - Orthonychiidae
Orthonychia "sp. A" Hall 1843 snail
Bivalvia
 Trigoniida - Schizodidae
Schizodus parvulus Cooper 1953 clam
Scaphopoda
 Dentaliida - Prodentaliidae
"Plagioglypta canna" = Prodentalium canna
"Plagioglypta canna" = Prodentalium canna White 1874 tusk shell
Strophomenata
 Orthotetida - Derbyiidae
Derbyia elongata n. sp. Cooper 1953
Derbyia arellanoi Cooper 1953
 Productida - Paucispiniferidae
Liosotella rugosa Cooper 1953
 Productida - Productellidae
"Dictyoclostus depressus" = Thamnosia depressa
"Dictyoclostus depressus" = Thamnosia depressa Cooper 1953
 Productida - Linoproductidae
"Anidanthus alatus" = Megousia alata
"Anidanthus alatus" = Megousia alata Cooper 1953
Rhynchonellata
 Rhynchonellida - Rhynchoporidae
 Spiriferida - Spiriferellidae
 Spiriferida - Trigonotretidae
Neospirifer sp. Fredericks 1919