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Sphenoceramus
Taxonomy
Sphenoceramus was named by Böhm (1915) [Sepkoski's age data: K Coni-u K Camp-l Sepkoski's reference number: 159].
It was reranked as Inoceramus (Sphenoceramus) by Kennedy et al. (1973) and Scott et al. (1986).
It was assigned to Inoceramus by Kennedy et al. (1973) and Scott et al. (1986); to Inoceramidae by Vokes (1980) and Elder and Box (1992); to Pterioida by Sepkoski (2002); and to Sphenoceramidae by Bouchet et al. (2010).
It was reranked as Inoceramus (Sphenoceramus) by Kennedy et al. (1973) and Scott et al. (1986).
It was assigned to Inoceramus by Kennedy et al. (1973) and Scott et al. (1986); to Inoceramidae by Vokes (1980) and Elder and Box (1992); to Pterioida by Sepkoski (2002); and to Sphenoceramidae by Bouchet et al. (2010).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1915 | Sphenoceramus Böhm |
| 1973 | Inoceramus (Sphenoceramus) Kennedy et al. p. 96 |
| 1980 | Sphenoceramus Vokes p. 40 |
| 1986 | Inoceramus (Sphenoceramus) Scott et al. p. 22 |
| 1992 | Sphenoceramus Elder and Box p. 33 |
| 2002 | Sphenoceramus Sepkoski |
| 2010 | Sphenoceramus Bouchet et al. |
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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. †Sphenoceramus Böhm 1915
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†Inoceramus (Sphenoceramus) lundbreckensis McLearn 1929
†Inoceramus (Sphenoceramus) pachti Archanguelsky 1916
†Sphenoceramus elegans Sokolow 1914
†Sphenoceramus gilli Walaszczyk and Cobban 2006
†Sphenoceramus naumanni Yokoyama 1890
†Sphenoceramus orientalis Sokolov 1914
†Sphenoceramus sachalinensis Sokolov 1914
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. P. Elder and S. E. Box 1992 | Commonly large, elongate, equivalve, and Inoceramus-like with trigonal sphenoid outline obliquely elongate to growth axis. Umbo very narrow and sharply rounded. Hinge short; posterior wing small, clearly separated from disk by deep sharp sulcus. Ornamentation of concentric rugae usually superimposed on radial or divergent plicae. Ornamentation weakens or disappears on posterior auricle. |