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Testudinaster

Asteroidea - Valvatida - Sphaerasteridae

Taxonomy
Testudinaster was named by Hess (1983) [Sepkoski's age data: J Bajo-u]. It is not extant. Its type is Testudinaster peregrinus.

It was assigned to Asterinidae by Hess (1983); to Sphaerasteridae by Hess (1994); and to Valvatida by Sepkoski (2002).

Synonymy list
YearName and author
1983Testudinaster Hess p. 919
1994Testudinaster Hess p. 988
2002Testudinaster Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderValvatida
familySphaerasteridae
genusTestudinaster

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
H. Hess 1994Body form pentagonal, highly inflated, domed. Oral face flat. Marginal plates not differentiated. Both sides completely covered with closely set ossicles, indented for papulae. Dorsal plates around center of disc irregularly polygonal, some indented for papulae, but most of them closely inter-fingered. Other abactinal plates transversally elongate and high, arranged in regular rows. Spines absent from abactinals. Actinals radially elongate, imbricated in central area and very high towards margin, surface covered with granules. Adambulacrals compact, not projecting into furrow, with tuft of small spines.