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Epanisoceras
Taxonomy
Epanisoceras was named by Collignon (1962).
It was assigned to Ammonoidea by Collignon (1962); and to Crioceratitinae by Rey et al. (2013).
It was assigned to Ammonoidea by Collignon (1962); and to Crioceratitinae by Rey et al. (2013).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Epanisoceras Collignon |
| 1963 | Ephamulina Collignon |
| 2007 | Ephamulina Szives p. 59 |
| 2013 | Epanisoceras Rey et al. p. 67 |
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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. †Epanisoceras Collignon 1962
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Invalid names: Ephamulina Collignon 1963 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Collignon 1962 | This Ammonite was described and figured in 1937. R. Casey pointed out (Ammonoidea of the Lower Greensand. 1961. II, p. 100) that it could not be related to Protanisoceras Spath. Indeed, it presents two particular characteristics: the existence of thick main ribs with 3 tubercles separated by around ten very fine and simple interlayers, and a partition with a first trifid lateral lobe, second lateral lobe of the same shape and very internal lobe. spread out. The affinities of this Ammonite are difficult to establish: I will soon publish in the "Albian" Fascicle a new very particular genre with ornamentation identical to that which has just been described, but with a single lateral lobe partition descending, in my opinion, from Hamulina of Orb. It is possible that Epanisoceras belongs to a lateral branch descending from similar Barremian forms. Upper Aptian. Area with Aconeceras Nisus and Melchiorites Melchioris. Deposit 245. Antanatanamirafy (Antsalova). Coll. V. Hourcq, 1934 |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Late/Upper Aptian to the top of the Early/Lower Albian or 122.46000 to 109.00000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Aptian | Madagascar | Espaniceras raulinianiforme (83999) Pictetia arcuata (84024) | |
| Albian | Madagascar | Ephamulina trituberculata (98230) | |
| Albian | Madagascar (Mahajanga) | Ephamulina arctuata (86497) | |
| Early/Lower Albian | Madagascar | Ephamulina trituberculata (98231) |