| 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), Sharifi et al. (2016).
It was assigned to Ammonoidea by Sepkoski (2002); and to Calycoceras by Wright et al. (1996), Kennedy et al. (1996), Sharifi et al. (2016).
It was reranked as Calycoceras (Gentoniceras) by Wright et al. (1996), Kennedy et al. (1996), Sharifi et al. (2016).
It was assigned to Ammonoidea by Sepkoski (2002); and to Calycoceras by Wright et al. (1996), Kennedy et al. (1996), 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 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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
show all | hide all
†Calycoceras (Gentoniceras) boehmi Spath 1926
†Calycoceras (Gentoniceras) gentoni Brongniart 1822
hide
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 |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Late/Upper Albian to the top of the Middle Cenomanian or 106.30000 to 93.90000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Albian | Spain | Gentoniceras gentoni (66129) | |
| Cenomanian | USA (Colorado) | Calycoceras leonense (230801) | |
| Cenomanian | United Kingdom (East Devon) | Eucalycoceras subgentoni (233957) | |
| Cenomanian | France (Haute-Normandie) | Ammonites gentoni (233956) | |
| Early/Lower Cenomanian - Middle Cenomanian | France | Calycoceras gentoni, Calycoceras subgentoni (230858) | |
| Late/Upper Cenomanian | USA (South Dakota) | Calycoceras sp. (77738) | |
| Middle Cenomanian | Tunisia (Sidi Bou Zid) | Calycoceras boehmi (217162) | |
| Middle Cenomanian | USA (Texas) | Eucalycoceras leonense (177076 234116) | |
| Middle Cenomanian | France (Normandy) | Calycoceras gentoni (4027) | |
| Middle Cenomanian | Iran | Calycoceras gentoni (183701) |