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Stibaraster

Asteroidea - Euaxosida - Palasterinidae

Taxonomy

Species
S. ratcliffei (type species)

Synonymy list
YearName and author
1993Stibaraster Blake and Guensburg p. 110
2002Stibaraster Sepkoski
2005Stibaraster Dean Shackleton p. 94
2007Stiberaster Blake and Rozhnov p. 524
2018Stibaraster Blake p. 29

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumEleutherozoa
Asterozoa()
classAsteroidea
orderEuaxosida
familyPalasterinidae
genusStibaraster

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.

G. †Stibaraster Blake and Guensburg 1993
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Stibaraster ratcliffei Blake and Guensburg 1993
Diagnosis
ReferenceDiagnosis
D. B. Blake and T. E. Guensburg 1993Five-armed, stoutly constructed asteroid; aboral numerous, small, stout, closely abutted; marginals in one row; proximal marginals much larger than aborals, vertically elongate, becoming similar in size, longitudinally elongate distally; marginals eaqual in number to adambulacrals proximally, more numerous distally; unpaired interbrachial marginal (i.e. axillary) abuts oral ossicular pair; adambulacral stout, broad, with flat outer face, spine base small, of equal size, ossicular furrow margin angular; ambulacral massive, with prominent transverse ridge separating broad podial basins; podial pores lacking; lateral articular facets in ridge-and-groove arrangements, these well developed on ambulacrals, adambulacrals; oral ossicles relatively small.