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Girvanaster

Asteroidea - Hudsonasteridae

Taxonomy
Girvanaster was named by Spencer (1916) [Sepkoski's age data: O Ashg-m]. Its type is Girvanaster sculptus.

It was synonymized subjectively with Protopalaeaster by Owen (1965).

It was assigned to Hudsonasterinae by Spencer and Wright (1966); to Pustulosida by Sepkoski (2002); and to Hudsonasteridae by Dean Shackleton (2005).

Synonymy list
YearName and author
1916Girvanaster Spencer p. 70
1966Girvanaster Spencer and Wright p. U50
2002Girvanaster Sepkoski, Jr.
2005Girvanaster Dean Shackleton p. 100

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumEchinodermata
subphylumAsterozoa
classAsteroidea
familyHudsonasteridae
genusGirvanaster

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
J. Dean Shackleton 2005Primary interradials with interradial projections pointing centrally; greater than three adambulacrals abutting against axillary; axillary diamond-shaped.