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Tropidaster pectinatus

Asteroidea - Tropidasteridae

Taxonomy
Tropidaster pectinatus was named by Forbes (1850). It is not extant. Its type specimen is Syntype BNHM E 1861, E 13570, OR 75690-2. It is the type species of Tropidaster.

Synonymy list
YearName and author
1850Tropidaster pectinatus Forbes figs. pl. 3
1966Tropidaster pectinatus Spencer and Wright p. U67 figs. fig. 61.1
1967Tropidaster pectinatus Wright p. 163
1993Tropidaster pectinatus Lewis pp. 66-67
1996Tropidaster pectinatus Blake pp. 182-187 figs. pl. 1 figs. 1-2, 4-7, pl. 2 figs. 2-8

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
classAsteroidea
RankNameAuthor
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderSurculifera
Spinulosida()
Velatida()
familyTropidasteridae
genusTropidaster
speciespectinatus

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
D. B. Blake 1996A Velatida in which the ossicles are stout in comparison with most members of the order. A distinct groove on the dorsal interbrachial axis is plated, lined by partially differentiated paxilla. The ossicles about the anus are enlarged and block-like. On the ambulacral ossicles, the adradial ambulacral body is prolonged and strongly overlapping and a ventral medial articular flange linking subsequent ambulacrals is developed. Ambulacral ossicles are large, occupying the entire ventral surface of the arms beyond the ambulacra; they are like those of the Solasteridae except that the ambulacral articular structures are restricted to the adradial end of the adambulacral; actinal ossicles are lacking, and the adambulacrals abut across the ventral interbrachial surface.