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Mediaster

Asteroidea - Valvatida - Goniasteridae

Taxonomy
Mediaster was named by Stimpson (1857) [Sepkoski's age data: K Camp-u R]. It is extant.

It was assigned to Goniasteridae by Spencer and Wright (1966) and Clark and Downey (1992); and to Valvatida by Sepkoski (2002).

Synonymy list
YearName and author
1857Mediaster Stimpson
1966Mediaster Spencer and Wright p. 62
1992Mediaster Clark and Downey p. 251
2002Mediaster Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderValvatida
familyGoniasteridae
genusMediaster

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
A. M. Clark and M.E. Downey 1992A genus of Goniasteridae with internal radiating ossicles connecting bases of tabulate abactinal plates; abactinals not bare in centre, bordering granules or spinelets in single row; no secondary abactinals; interradial margins arcuate; marginal plates corresponding, forming definite border not higher than abactinal surface; adambulacral furrow margin straight.