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Vernonaspis major

Pteraspidomorpha - Cyathaspidiformes - Cyathaspididae

Taxonomy
Vernonaspis major was named by Denison (1963). Its type specimen is PU 17104, a partial skeleton, and it is a 3D body fossil. Its type locality is Beaver River, which is in a Silurian marine dolomite in Canada.

Synonymy list
YearName and author
1963Vernonaspis major Denison p. 110

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumCraniata
superclassPteraspidomorphi(Goodrich 1909)
RankNameAuthor
classPteraspidomorpha
subclassHeterostraciLankester 1868
orderCyathaspidiformes(Kaier 1930)
suborderCyathaspidoidei
familyCyathaspididaeFlower and Wayland-Smith 1952
genusVernonaspis
speciesmajor

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
ReferenceDiagnosis
R. H. Denison 1963The length of the dorsal shield is 57 mm. in the type. The dentine ridges are 5 to 6 per millimeter. The dorsal shield has a rounded median lobe on its posterior edge, and sharply marked post- branchial processes.