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Psephaspis
Taxonomy
Psephaspis is a genus. It is not extant.
It was assigned to Pteraspidinae by Denison (1970); to Pteraspidomorphes by Sepkoski (2002); and to Protaspididae by Randle and Sansom (2017).
It was assigned to Pteraspidinae by Denison (1970); to Pteraspidomorphes by Sepkoski (2002); and to Protaspididae by Randle and Sansom (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1970 | Psephaspis Denison p. 36 |
| 2002 | Psephaspis Sepkoski |
| 2017 | Psephaspis Randle and Sansom p. 596 |
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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. †Psephaspis
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†Psephaspis idahoensis Denison 1968
†Psephaspis williamsi Ørvig 1961
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. H. Denison 1970 | Moderate to large-sized pteraspids with the shield
usually relatively broad, and with the ornament consisting typically of denticles with crenulate margins. The branchial openings are at the postero-lateral corners of the shield, at the posterior ends of the branchial plates. |