| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Calycoceras (Gentoniceras)
Taxonomy
Gentoniceras was named by Thomel (1972) [Sepkoski's age data: K Ceno].
It was reranked as Calycoceras (Gentoniceras) by Wright et al. (1996), Kennedy et al. (1996) and Sharifi et al. (2016).
It was assigned to Ammonoidea by Sepkoski (2002); and to Calycoceras by Wright et al. (1996), Kennedy et al. (1996) and Sharifi et al. (2016).
It was reranked as Calycoceras (Gentoniceras) by Wright et al. (1996), Kennedy et al. (1996) and Sharifi et al. (2016).
It was assigned to Ammonoidea by Sepkoski (2002); and to Calycoceras by Wright et al. (1996), Kennedy et al. (1996) and Sharifi et al. (2016).
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Gentoniceras Thomel p. 65 |
| 1996 | Calycoceras (Gentoniceras) Kennedy et al. p. 12 |
| 1996 | Calycoceras (Gentoniceras) Wright et al. p. 164 |
| 2002 | Gentoniceras Sepkoski |
| 2016 | Calycoceras (Gentoniceras) Sharifi et al. p. 604 |
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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.
Subg. †Calycoceras (Gentoniceras) Thomel 1972
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†Calycoceras (Gentoniceras) boehmi Spath 1926
†Calycoceras (Gentoniceras) gentoni Brongniart 1822
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Invalid names: Eucalycoceras subgentoni Spath 1926 [synonym]
†Calycoceras (Gentoniceras) leonense Adkins 1928
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Wright et al. 1996 | Small, evolute, with strongly tuberculate inner whorls; siphonal tubercles normally disappearing early, then ventrolaterals; umbilical tubercles may persist; body chamber with strong, well-spaced ribs; ribs single, or branching at umbilical tubercles or edge, or long and short, and uninterrupted on evenly rounded venter. Strongly dimorphic; macroconchs commonly twice the size of microconchs |