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Eucyrtaspis
Taxonomy
Eucyrtaspis was named by White and Moy-Thomas (1940).
Species
Synonyms
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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. †Eucyrtaspis White and Moy-Thomas 1940
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Invalid names: Cyrtaspis Bryant 1932 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. L. Bryant 1932 (Cyrtaspis) | Pteraspids with broadly ovate dorsal shield and ventral
shield about as wide as long. The rostrum is short and broad. The eyes, large and placed well forward, are indicated by notches in the dorsal shield. The bony carapace is thin. The visceral side of the dorsal shield bears no impressions of internal organs and hence must have overlaid a thick cartilaginous endocranium. Outer surface of carapace sculptured with fine grooves and beaded ridges. Number and arrangement of plates of dorsal shield unknown. | |
| W. L. Bryant 1933 (Cyrtaspis) | Forms closely related to the genus Protaspis and differing in the wider branchial plates and in the superficial ornamentation. This consists of continuous linear rows of beads or papille arranged to follow the contour of the various plates, thus forming a conspicuous and characteristic ornamentation. |