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Pseudocalycoceras
Taxonomy
Pseudocalycoceras was named by Thomel (1969) [Sepkoski's age data: K Ceno-u].
It was assigned to Acanthoceratidae by Cobban (1988); to Ammonoidea by Sepkoski (2002); and to Acanthoceratinae by Cooper (1978), Wright et al. (1996) and Ahmad et al. (2013).
It was assigned to Acanthoceratidae by Cobban (1988); to Ammonoidea by Sepkoski (2002); and to Acanthoceratinae by Cooper (1978), Wright et al. (1996) and Ahmad et al. (2013).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1969 | Pseudocalycoceras Thomel p. 650 |
| 1972 | Pseudocalycoceras (Haugiceras) Thomel |
| 1978 | Pseudocalycoceras Cooper p. 93 |
| 1988 | Pseudocalycoceras Cobban p. 12 |
| 1996 | Pseudocalycoceras Wright et al. p. 164 |
| 2002 | Pseudocalycoceras Sepkoski |
| 2013 | Pseudocalycoceras Ahmad et al. p. 27 |
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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. †Pseudocalycoceras Thomel 1969
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†Eucalycoceras harpax tulearensis Collignon 1937
Subg. †Pseudocalycoceras (Pseudocalycoceras) Thomel 1969
†Pseudocalycoceras angolaense Spath 1931
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Invalid names: Eucalycoceras dentonense Moreman 1942 [synonym], Eucalycoceras indianense Moreman 1942 [synonym], Eucalycoceras lewisvillense Moreman 1942 [synonym], Eucalycoceras underwoodi Powell 1963 [synonym]
†Pseudocalycoceras harpax Stoliczka 1864
Invalid names: Pseudocalycoceras (Haugiceras) Thomel 1972 [invalid subgroup]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Wright et al. 1996 | Slightly compressed to slightly depressed; ribs flexuous to convex and prorsiradiate, more or less regularly branching or long and short; primaries arising from umbilical bullae, characteristically twisted; all ribs with inner ventrolateral nodes or clavi and outer ventrolateral and siphonal clavi; on latter part of body chamber ribs narrow, approximate, and generally recurved; tubercles disappearing. |