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Aspidaster

Asteroidea - Valvatida - Stauranderasteridae

Taxonomy
Aspidaster was named by de Loriol (1884) [Sepkoski's age data: J Bath T Dani]. It is not extant. Its type is Aspidaster delgadoi. It was considered monophyletic by Villier et al. (2004).

It was assigned to Valvatida by Sepkoski (2002); and to Stauranderasteridae by Spencer and Wright (1966), Villier et al. (2004) and Villier (2010).

Synonymy list
YearName and author
1884Aspidaster de Loriol
1966Aspidaster Spencer and Wright p. 55
2002Aspidaster Sepkoski, Jr.
2004Aspidaster Villier et al. p. 40
2010Aspidaster Villier p. 706

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderValvatida
familyStauranderasteridae
genusAspidaster

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
L. Villier et al. 2004External face with large deeply impressed granule pits, digging into a raised central area and a depressed margin. Articulatory processes kidney-shape in external view. No pedicellariae pits identified. Arms elongate with parallel sides. Superomarginal and abactinal plates differentiated. Passageway for the papullae visible at plate corners. A single row of abactinals in the arms. Primary circlet plates enlarged.