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Poraspis

Pteraspidomorpha - Cyathaspididae

Taxonomy
Poraspis was named by Kiaer (1932) [Sepkoski's age data: S Prid D Gedi-u Sepkoski's reference number: 2]. Its type is Holaspis sericeus.

It was assigned to Poraspidinae by Elliott and Petriello (2011); and to Poraspidae by Kiaer (1932) and Van Der Laan (2019).

Synonymy list
YearName and author
1932Poraspis Kiaer p. 13 figs. Fig. 1 & 2; Pl. I; Pl. Il; Pl. Ill, 1,2 &3
2011Poraspis Elliott and Petriello p. 520
2019Poraspis Van Der Laan p. 17

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumCraniata
RankNameAuthor
superclassPteraspidomorphi(Goodrich 1909)
classPteraspidomorpha
subclassHeterostraciLankester 1868
familyCyathaspididae()
subfamilyPoraspidinae()
genusPoraspis

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. †Poraspis Kiaer 1932
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Poraspis barroisi Leriche 1906
Poraspis brevis Kiaer 1932
Poraspis cylindrica Kiaer 1932
Poraspis elongata Kiaer 1932
Poraspis intermedia Kiaer 1932
Poraspis magna Kiaer 1932
Poraspis polaris Kiaer 1932
Poraspis rostrata Kiaer 1932
Poraspis sericea Lankester 1873
Poraspis sturi von Alth 1874
Poraspis subtilis Kiaer 1932
Poraspis thomasi Elliott and Petriello 2011
Diagnosis
ReferenceDiagnosis
D. K. Elliott and M. A. Petriello 2011(Modified after Elliott et al., 1998.) Rostral region narrowing in front of orbits; anterior border has a slight median convexity; maxillary brim broad, covered with ridges parallel to anterior edge. Postbranchial lobe of dorsal shield generally long and strongly developed. Posterior margins of dorsal and ventral shields bear pronounced, rounded, median lobes. Dentine ridges fine, 7–13 per mm; ridge pattern mostly longitudinal but may be fanned or irregular on rostrum and anterior triangle of dorsal shield; generally one or more ridges parallel to anterior edge of shield. Epitega indicated faintly or not at all. Pineal macula distinct. Lateral line pores and canals large.