USNM806l, Cerros de los Monos, El Antimonio, Sonora (Permian of Mexico)

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: Antimonio Formation, Wordian (268.8 - 265.1 Ma)

• "Monos Beds"; Dictyoclostus zone is fourth-highest zone in succession

Environment/lithology: marine; limestone

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 40830: authorized by David Bottjer, entered by Matthew Clapham on 01.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Rugosochonetidae
"Chonetes gibberulus n. sp." = Chonetinella gibberulus
"Chonetes gibberulus n. sp." = Chonetinella gibberulus Cooper 1953
 Productida - Paucispiniferidae
Liosotella sp. Cooper 1953
 Productida -
Marginifera "sp. 1" Waagen 1884
 Productida - Productellidae
"Dictyoclostus depressus" = Thamnosia depressa
"Dictyoclostus depressus" = Thamnosia depressa Cooper 1953
 Productida - Productidae
"Muirwoodia sp." = Yakovlevia
"Muirwoodia sp." = Yakovlevia Fredericks 1925
 Productida - Echinoconchidae
"Waagenoconcha montpelierensis" = Bathymyonia nevadensis
"Waagenoconcha montpelierensis" = Bathymyonia nevadensis Meek 1877
 Orthotetida - Schuchertellidae
Rhynchonellata
 Rhynchonellida - Rhynchoporidae