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Terminaster

Asteroidea -

Taxonomy
Terminaster was named by Hess (1974) [Sepkoski's age data: J Sine-l J Oxfo Sepkoski's reference number: 911,1066]. It is not extant. It was considered monophyletic by Hess (1974) and Gale (2011).

It was assigned to Zoroasteridae by Hess (1974); to Forcipulatida by Sepkoski (2002); to Forcipulatacea by Villier et al. (2009); and to Terminasteridae by Gale (2011) and Gale (2011).

Synonymy list
YearName and author
1974Terminaster Hess p. 657
2002Terminaster Sepkoski, Jr.
2009Terminaster Villier et al. p. 390
2011Terminaster Gale p. 84

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumAsterozoa
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderForcipulatacea
genusTerminaster

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 1974Size small. Form stellate with reduced disc and cylindrical arms. Primary plates of the disc clearly differentiated with one centrodorsal and a crown of radial and interradial plates. Plates of the arm large, aligned in well-defined rows (radial, superomarginal and inferomarginal plates) and each plate with a spine. Few Additional and reduced abactinal plates intercalated between radial and superomarginal plates. Adambulacral plates all of the same shape, with ornament of two spines. Two rows of podia. Mouth angle plate with a large oral spine. First adambulacral plates of adjoining arms in contact interbrachially. Terminal plate very large with aligned tubercles for articulation of spines on oral margins and smaller tubercles on the dorsal side. Pedicellariae absent.