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"; Leiorhynchoidea-Cancrinella Zone is third-highest (of 7) in the succession
Environment/lithology: marine; calcareous shale
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 40823: authorized by David Bottjer, entered by Matthew Clapham on 01.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Lingulata | |
Orbiculoidea "sp. 2" d'Orbigny 1847 | |
Strophomenata | |
"Chonetes foshagi n. sp." = Neochonetes (Neochonetes) foshagi
"Chonetes foshagi n. sp." = Neochonetes (Neochonetes) foshagi Cooper 1953 | |
"Muirwoodia sp." = Yakovlevia, "Dictyoclostus" sp.
"Muirwoodia sp." = Yakovlevia Fredericks 1925 | |
"Waagenoconcha montpelierensis" = Bathymyonia nevadensis
"Waagenoconcha montpelierensis" = Bathymyonia nevadensis Meek 1877 | |
Liosotella magnirugosa n. sp. Cooper 1953
Liosotella rugosa Cooper 1953 | |
Cancrinella phosphatica Girty 1910 | |
Rhynchonellata | |
"Spiriferellina laxa" = Reticulariina laxa
"Spiriferellina laxa" = Reticulariina laxa Girty 1908 | |
"Punctospirifer convexus n. sp." = Paraspiriferina convexa
"Punctospirifer convexus n. sp." = Paraspiriferina convexa Cooper 1953 | |
Spiriferella "sp. 1" Tschernyschew 1902 | |
Glossothyropsis magna Cooper 1953 | |
Dielasma cf. spatulatum Girty 1908 | |
Leiorhynchoidea cloudi n. sp.
Leiorhynchoidea cloudi n. sp. Cooper 1953 | |
Stenoscisma sp. Conrad 1839 | |
Rhynchopora taylori Girty 1910 | |
? Uncinunellina pulchra n. sp. Cooper 1953
Wellerella sp. Dunbar and Condra 1932
Wellerella lemasi Cooper 1953
Wellerella rotunda n. sp. Cooper 1953 | |
Composita sp. Brown 1849 | |
| |
Bivalvia | |
"Nuculana obesa" = Polidevcia obesa
"Nuculana obesa" = Polidevcia obesa White 1879 clam | |
| |
"Aviculopecten montpelierensis" = Streblopteria montpelierensis
"Aviculopecten montpelierensis" = Streblopteria montpelierensis Girty 1910 scallop | |
"Pleurophorus sonorensis" = Stutchburia sonorensis
"Pleurophorus sonorensis" = Stutchburia sonorensis Cooper 1953 clam | |
Gastropoda | |
? Omphalotrochus "sp. A" Meek 1864 snail | |
? Pleurotomaria "sp. A" Defrance 1826 snail
? Pleurotomaria "sp. B" Defrance 1826 snail |