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Ptychodus polygyrus marginalis
Taxonomy
Ptychodus polygyrus marginalis was named by Agassiz (1839). It is a 3D body fossil.
It was recombined as Ptychodus marginalis by Herman (1977), Amadori et al. (2023), Amadori et al. (2023).
It was recombined as Ptychodus marginalis by Herman (1977), Amadori et al. (2023), Amadori et al. (2023).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1839 | Ptychodus polygyrus marginalis Agassiz p. 156 figs. Pl 25, figs 6,8 |
| 1977 | Ptychodus marginalis Herman p. 72 figs. Pl 2, fig 11 |
| 2023 | Ptychodus marginalis Amadori et al. p. 4 fig. 2C,G |
| 2023 | Ptychodus marginalis Amadori et al. p. 14 fig. 8 |
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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.
†Ptychodus polygyrus marginalis Agassiz 1839
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Diagnosis
No diagnoses are available