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Strepsodiscus franconiensis
Taxonomy
Hypseloconus franconiensis was named by Berkey (1898). Its type specimen is AMNH 2271, a shell, and it is a 3D body fossil. Its type locality is 1 kilometer south of Taylors Falls, half kilometer north of Folsom Island, which is in a Steptoean coastal sandstone in the Franconia Formation of Minnesota.
It was recombined as Strepsodiscus franconiensis by Wagner (2023).
It was recombined as Strepsodiscus franconiensis by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1898 | Hypseloconus franconiensis Berkey p. 285 figs. pl. 19 f. 17, 18;pl. 21 f. 10. |
| 2006 | Hypseloconus franconiensis Yochelson and Webers pp. 51 - 53 fig. 11A |
| 2023 | Strepsodiscus franconiensis Wagner p. S7978 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Strepsodiscus franconiensis Berkey 1898
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. L. Yochelson and G. F. Webers 2006 | Small shell, strongly curved and strongly compressed laterally; apex is unknown; shell is coiled and completes about three-quarters of a whorl; aperture is elongate and so strongly compressed that the lateral sides are subparallel; growth lines and other details of the exterior are unknown. |