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Eucyclaspis
Taxonomy
Eucyclaspis was named by Denison (1970). Its type is Protaspis (Protaspis) erroli.
It was reranked as Protaspis (Eucyclaspis) by Denison (1970).
It was assigned to Protaspis by Denison (1970); and to Pteraspidoidei by Randle and Sansom (2017).
It was reranked as Protaspis (Eucyclaspis) by Denison (1970).
It was assigned to Protaspis by Denison (1970); and to Pteraspidoidei by Randle and Sansom (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1970 | Eucyclaspis Denison p. 27 |
| 1970 | Protaspis (Eucyclaspis) Denison p. 27 |
| 2017 | Eucyclaspis 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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. H. Denison 1970 | A Protaspis in which the branchial ducts open posteriorly at the postero-lateral corners of the rather broad shield (fig. 18),
and are bounded by the branchial plates ventrally and laterally, by the dorsal disc dorsally, and by probable cornual plates medially. The dorsal spine is slender and erect, and each orbital plate has a process projecting postero-laterally from its lateral margin behind the orbit. The ornament consists of very fine ridges more or less concentric to lines of growth. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Carroll 1988, Kiessling 2004 | |||||