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Cosmaspis
Taxonomy
Protaspis (Cosmaspis) was named by Denison (1970). Its type is Protaspis (Cosmaspis) transversa.
It was reranked as Cosmaspis by Elliot and Johnson (1997) and Randle and Sansom (2017).
It was assigned to Protaspis by Denison (1970); to Pteraspididae by Elliot and Johnson (1997); and to Protaspididae by Randle and Sansom (2017).
It was reranked as Cosmaspis by Elliot and Johnson (1997) and Randle and Sansom (2017).
It was assigned to Protaspis by Denison (1970); to Pteraspididae by Elliot and Johnson (1997); and to Protaspididae by Randle and Sansom (2017).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1970 | Protaspis (Cosmaspis) Denison p. 21 |
| 1997 | Cosmaspis Elliot and Johnson p. 181 |
| 2017 | Cosmaspis 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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. H. Denison 1970 | Dorsal shield broad or highly vaulted. Ornamentation mostly arranged in bands more or less parallel to lines of growth, while within the bands the individual dentine ridges are arranged diagonally, or sometimes transversely or irregularly with respect to the bands. Branchial openings behind the dorsal disc at the posterior tips of the branchial plates. |