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Ptychoceras
Taxonomy
Ptychoceras was named by d'Orbigny (1842) [Sepkoski's age data: K Barr-u K Albi-u]. It is the type genus of Ptychoceratidae.
It was reranked as Hamites (Ptychoceras) by Anderson (1902); it was reranked as Hemiptychoceras (Ptychoceras) by Kennedy (1994).
It was assigned to Hamites by Anderson (1902); to Hemiptychoceras by Kennedy (1994); to Ammonoidea by Sepkoski (2002); and to Ptychoceratidae by Wright (1952), Henderson (1990), Kakabadze and Hoedemaeker (1997), Landra et al. (2000), Szives (2007) and Klein et al. (2007).
It was reranked as Hamites (Ptychoceras) by Anderson (1902); it was reranked as Hemiptychoceras (Ptychoceras) by Kennedy (1994).
It was assigned to Hamites by Anderson (1902); to Hemiptychoceras by Kennedy (1994); to Ammonoidea by Sepkoski (2002); and to Ptychoceratidae by Wright (1952), Henderson (1990), Kakabadze and Hoedemaeker (1997), Landra et al. (2000), Szives (2007) and Klein et al. (2007).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1842 | Ptychoceras d'Orbigny |
| 1902 | Hamites (Ptychoceras) Anderson p. 90 |
| 1952 | Ptychoceras Wright |
| 1990 | Ptychoceras Henderson p. 125 |
| 1994 | Hemiptychoceras (Ptychoceras) Kennedy p. 231 |
| 1997 | Ptychoceras Kakabadze and Hoedemaeker p. 81 |
| 2000 | Ptychoceras Landra et al. p. 38 |
| 2002 | Ptychoceras Sepkoski |
| 2007 | Ptychoceras Klein et al. p. 264 |
| 2007 | Ptychoceras Szives p. 58 |
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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. †Ptychoceras d'Orbigny 1842
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†Ptychoceras adpressum Sowerby 1814
†Ptychoceras emericianum d'Orbigny 1842
†Ptychoceras fauncei Haas 1942
†Ptychoceras laeve Matheron 1842
†Ptychoceras laeve Gabb 1869
†Ptychoceras natrice Anderson 1938
†Ptychoceras poni Simionescu 1898
†Ptychoceras puzosianum d'Orbigny 1842
†Ptychoceras quadratus Gabb 1864
Diagnosis
No diagnoses are available