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Stauranderaster pyramidalis

Asteroidea - Valvatida - Stauranderasteridae

Taxonomy
Stauranderaster gibbosus pyramidalis was named by Spencer (1913). It is not extant. Its type specimen is Geological Museum of Copenhagen University.

It was recombined as Stauranderaster pyramidalis by BrĂ¼nnich-Nielsen (1943), Rasmussen (1950), Rasmussen (1979) and Villier et al. (2004).

Synonymy list
YearName and author
1913Stauranderaster gibbosus pyramidalis Spencer p. 135 figs. pl. 13, fig. 12-13; pl. 16, fig. 30
1943Stauranderaster pyramidalis BrĂ¼nnich-Nielsen p. 63
1950Stauranderaster pyramidalis Rasmussen p. 87 figs. pl. 10, fig. 15
1979Stauranderaster pyramidalis Rasmussen p. 70
2004Stauranderaster pyramidalis Villier et al. p. 40

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
classAsteroidea
RankNameAuthor
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderValvatida
familyStauranderasteridae
genusStauranderaster
speciespyramidalis()

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. W. Rasmussen 1950A Stauranderaster whose large abactinal ossicles have a semi spherical or, more commonly bell-shaped outer surface. The ornamentation of the surface is usually composed of scattered spine-pits, which may be lipped. There can also be a weak rugosity on the peripheral part of the ossicle, together with a narrow somewhat depressed border.