USNM806k, 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 (266.9 - 264.3 Ma)

• "Monos Beds"; Dictyoclostus Zone is fourth-highest of seven in the 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 40827: authorized by David Bottjer, entered by Matthew Clapham on 01.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
Gastropoda
 Bellerophontida - Euphemitidae
Euphemites sp.
Euphemites sp. Warthin 1930 snail
Strophomenata
 Productida -
Marginifera "sp. 1"
Marginifera "sp. 1" Waagen 1884
 Productida - Paucispiniferidae
Liosotella sp.
Liosotella sp. Cooper 1953
 Productida - Productellidae
"Dictyoclostus depressus n. sp." = Thamnosia depressa
"Dictyoclostus depressus n. sp." = 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
 Strophomenida - Rugosochonetidae
"Chonetes gibberulus" = Chonetinella gibberulus
"Chonetes gibberulus" = Chonetinella gibberulus Cooper 1953
 Orthotetida - Schuchertellidae
Streptorhynchus sp.
Rhynchonellata
 Spiriferinida - Reticulariinidae
"Spiriferellina sonorensis" = Reticulariina sonorensis, "Spiriferellina laxa" = Reticulariina laxa
"Spiriferellina sonorensis" = Reticulariina sonorensis Cooper 1953
"Spiriferellina laxa" = Reticulariina laxa Girty 1908
 Spiriferida - Spiriferellidae
Spiriferella "sp. 1"
Spiriferella "sp. 1" Tschernyschew 1902
 Spiriferida - Trigonotretidae
Neospirifer "sp. 1", Neospirifer "sp. 2"
Neospirifer "sp. 1" Fredericks 1919
Neospirifer "sp. 2" Fredericks 1919
 Athyridida - Neoretziidae
Hustedia sp.
Hustedia sp. Hall and Clarke 1893
 Athyridida - Athyrididae
Composita grandis
Composita grandis Cooper 1953