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Semiformiceras
Taxonomy
Semiformiceras is a genus. It is not extant.
It was assigned to Oppeliidae by Zeiss et al. (1994); to Ammonoidea by Sepkoski (2002); and to Streblitinae by Arkell et al. (1957) and Grigore (2018).
It was assigned to Oppeliidae by Zeiss et al. (1994); to Ammonoidea by Sepkoski (2002); and to Streblitinae by Arkell et al. (1957) and Grigore (2018).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Semiformiceras Arkell et al. p. 284 |
| 1994 | Semiformiceras Zeiss et al. p. 370 |
| 2002 | Semiformiceras Sepkoski |
| 2018 | Semiformiceras Grigore p. 18 |
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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.
G. †Semiformiceras
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†Semiformiceras fallauxi Oppel 1865
†Semiformiceras semiforme Oppel 1865
Diagnosis
No diagnoses are available