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Ptychaspis
Taxonomy
Ptychaspis was named by Hall (1863) [Sepkoski's age data: Cm Fran-l Cm Fran-u Sepkoski's reference number: 16,464].
It was assigned to Asaphida by Sepkoski (2002); and to Ptychaspididae by Jell and Adrain (2002).
It was assigned to Asaphida by Sepkoski (2002); and to Ptychaspididae by Jell and Adrain (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1863 | Ptychaspis Hall |
| 1933 | Asioptychaspis Kobayashi |
| 2002 | Ptychaspis Jell and Adrain p. 436 |
| 2002 | Ptychaspis Sepkoski |
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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. †Ptychaspis Hall 1863
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†Ptychaspis granulosa Owen 1852
†Ptychaspis miniscaensis Owen 1852
†Ptychaspis minuta Whitfield 1878
†Ptychaspis pustulosa Hall and Whitfield 1877
†Ptychaspis tuberosa Feniak 1952
Invalid names: Asioptychaspis Kobayashi 1933 [synonym]
Diagnosis
No diagnoses are available