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Protaspis
Taxonomy
Protaspis was named by Bryant (1933).
It was assigned to Protaspidae by Bryant (1933); to Pteraspidinae by Denison (1970); and to Pteraspidoidei by Randle and Sansom (2017).
It was assigned to Protaspidae by Bryant (1933); to Pteraspidinae by Denison (1970); and to Pteraspidoidei by Randle and Sansom (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1933 | Protaspis Bryant p. 294 |
| 1970 | Protaspis Denison p. 8 |
| 2017 | Protaspis Randle and Sansom p. 597 |
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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. †Protaspis Bryant 1933
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Subg. †Protaspis (Europrotaspis) White 1961
Subg. †Protaspis (Protaspis) Bryant 1933
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†Protaspis (Protaspis) brevispina Denison 1970
†Protaspis (Protaspis) dorfi Bryant 1932
†Protaspis (Protaspis) mcgrewi Denison 1970
†Protaspis brevirostris Bryant 1933
†Protaspis bucheri Bryant 1932
†Protaspis cingulus Bryant 1933
†Protaspis constrictus Bryant 1933
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. L. Bryant 1933 | These are relatively large forms in which the dorsal shield
is strongly vaulted, the rostral plate short and broad, the branchials narrow. The ventral shield is ovate or tongue- shaped and weakly curved, more so posteriorly. The dermal skeleton is very thin. Its surface is o'rnamented with fine, subparallel dentine ridges that follow the outlines of the various plates. Nine species of Protaspis are known. | |
| R. H. Denison 1970 | Moderate-sized to large pteraspids with the dorsal shield rather broad or highly vaulted. The rostrum very shor tto moderate in length, with the development of its ventral preoral surface dependent on the rostral length. The branchial plates long, the cornual plates reduced or absent, and the branchial openings at the postero-lateral corners of the shield. The dorsal spine usually small, recumbent, and scale-like. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Lochkovian to the top of the Emsian or 419.62000 to 393.47000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lochkovian | USA (Wyoming) | P. mcgrewi, P. brevispina (153534) | |
| Early/Lower Devonian | USA (Wyoming) | P. mcgrewi, P. brevispina (26179) | |
| Emsian | USA (Wyoming) | P. bucheri, P. dorfi (26176) |