USNM loc. 13257, Roberts Creek Mountain, Roberts Mountains (Silurian of the United States)
Where: Eureka County, Nevada (39.9° N, 116.3° W: paleocoordinates 11.5° S, 66.1° W)
• coordinate estimated from map
When: Roberts Mountains Formation, Ludlow (427.4 - 423.0 Ma)
Environment/lithology: marine; limestone
Size class: macrofossils
Preservation: replaced with silica
Reposited in the USNM
Primary reference: A. J. Boucot. 1971. Aenigmastrophia, new genus, a difficult Silurian brachiopod. In J. T. Dutro (ed.), Paleozoic Perspectives A Paleontological Tribute to G. Arthur Cooper 155-158 [J. Marcot/J. Marcot]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 227120: authorized by Jonathan Marcot, entered by Jonathan Marcot on 12.09.2022
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Rhynchonellata | |
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Isorthis sp. Kozlowski 1929 | |
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Dalejina sp. Havlicek 1953 | |
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Dolerorthis sp. Schuchert and Cooper 1931
Ptychopleurella sp. Schuchert and Cooper 1931 | |
"Atrypella sp." = Atrypoidea
"Atrypella sp." = Atrypoidea Mitchell and Dun 1920 | |
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Spirigerina cf. marginalis Dalman 1828 | |
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Atrypa sp. Dalman 1828 | |
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Nucleospira sp. Hall 1859 | |
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Alaskospira sp. Kirk and Amsden 1952 | |
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? Howellella sp. Kozlowski 1946 | |
Aenigmastrophia cooperi n. gen. n. sp.
Aenigmastrophia cooperi n. gen. n. sp. Boucot 1971 | |
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Gypidula sp. Hall 1867 | |
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| Strophomenoidea | |
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