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Ammonoceratites
Taxonomy
Ammonoceratites was named by Bowditch (1822) [Sepkoski's age data: K Apti-u K Albi-u Sepkoski's reference number: 1066]. Its type is Ammonoceratites lamarcki. It is the type genus of Ammonoceratitidae.
It was reranked as Lytoceras (Ammonoceratites) by Collignon (1962); it was synonymized subjectively with Lytoceras by Hoffmann (2010).
It was assigned to Lytoceras by Collignon (1962); to Ammonoceratitidae by Brunnschweiler (1966); to Ammonoidea by Sepkoski (2002); and to Lytoceratinae by Wright et al. (1996) and Hoffmann (2015).
It was reranked as Lytoceras (Ammonoceratites) by Collignon (1962); it was synonymized subjectively with Lytoceras by Hoffmann (2010).
It was assigned to Lytoceras by Collignon (1962); to Ammonoceratitidae by Brunnschweiler (1966); to Ammonoidea by Sepkoski (2002); and to Lytoceratinae by Wright et al. (1996) and Hoffmann (2015).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1822 | Ammonoceratites Bowditch p. 21 |
| 1962 | Lytoceras (Ammonoceratites) Collignon p. 8 |
| 1966 | Ammonoceratites Brunnschweiler p. 15 |
| 1996 | Ammonoceratites Wright et al. p. 2 |
| 2002 | Ammonoceratites Sepkoski |
| 2015 | Ammonoceratites Hoffmann pp. 10-12 |
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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. †Ammonoceratites Bowditch 1822
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†Ammonoceratites crenocostatus Whiteaves 1876
†Ammonoceratites lamarcki Bowditch 1822
†Lytoceras (Ammonoceratites) betiokyense Collignon 1962
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Hoffmann 2015 | Large, evolute, whorls barely in contact, circular whorl section. Dense, fine, strongly crinkled riblets or growth lines, moderate to high whorl expansion rate; doubtfully distinct from Lytoceras (Kennedy & Klinger, 1978) |
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 Albian or 122.46000 to 100.50000 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Aptian | Madagascar | Lytoceras betiokyense (84024) | |
| Albian | Madagascar | A. mahadeva (98227 98234 98264 98268) | |
| Albian | Madagascar (Mahajanga) | A. mahadeva (86497) | |
| Albian | Canada (British Columbia) | A. crenocostatus (87476 87477 87478 87697) A. sp. (57081 87678) | |
| Middle Albian | Japan (Hokkaido) | A. ezoense (92726) | |
| Motuan | New Zealand | A. sp. (83438) |