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Polyptychoceras
Taxonomy
Polyptychoceras was named by Yabe (1927) [Sepkoski's age data: K Coni-u K Maes-l Sepkoski's reference number: 971]. It is the type genus of Polyptychoceratinae.
It was assigned to Diplomoceratinae by Matsumoto (1984); to Ammonoidea by Sepkoski (2002); and to Polyptychoceratinae by Kennedy and Summesberger (1999) and Ifrim et al. (2013).
It was assigned to Diplomoceratinae by Matsumoto (1984); to Ammonoidea by Sepkoski (2002); and to Polyptychoceratinae by Kennedy and Summesberger (1999) and Ifrim et al. (2013).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1927 | Polyptychoceras Yabe |
| 1984 | Polyptychoceras Matsumoto p. 29 |
| 1999 | Polyptychoceras Kennedy and Summesberger p. 29 |
| 2002 | Polyptychoceras Sepkoski |
| 2013 | Polyptychoceras Ifrim et al. p. 894 |
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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. †Polyptychoceras Yabe 1927
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Subg. †Polyptychoceras (Polyptychoceras) Yabe 1927
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†Polyptychoceras (Polyptychoceras) obliquecostatum Schluter 1872
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Invalid names: Hamites berkelis Schluter 1876 [synonym]
†Polyptychoceras (Polyptychoceras) obstrictum Jimbo 1894
Subg. †Polyptychoceras (Subptychoceras) Shimizu 1935
†Polyptychoceras pseudogaultinum Yokoyama 1890
Diagnosis
No diagnoses are available