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Stemmatoceras
Taxonomy
Stemmatoceras was named as a genus. It is not extant.
It was reranked as Stephanoceras (Stemmatoceras) by Arkell (1954).
It was assigned to Stephanoceras by Arkell (1954); to Stephanoceratidae by Arkell et al. (1957); and to Ammonoidea by Sepkoski (2002).
It was reranked as Stephanoceras (Stemmatoceras) by Arkell (1954).
It was assigned to Stephanoceras by Arkell (1954); to Stephanoceratidae by Arkell et al. (1957); and to Ammonoidea by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Stephanoceras (Stemmatoceras) Arkell p. 582 |
| 1957 | Stemmatoceras Arkell et al. p. 289 |
| 2002 | Stemmatoceras Sepkoski |
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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. †Stemmatoceras
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†Stemmatoceras arcicostum Imlay 1967
†Stephanoceras (Stemmatoceras) subcoronatum Oppel 1856
†Stephanoceras (Stemmatoceras) triptolemus Morris and Lycett 1851
Diagnosis
No diagnoses are available