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Lithaster jurassicus

Asteroidea - Valvatida - Stauranderasteridae

Taxonomy
Pentaceros (Oreaster) jurassicus was named by von Zittel (1876). It is not extant. Its type specimen is Paläontologischen Staatssammlung, München. It is the type species of Lithaster.

It was recombined as Pentaceros jurassicus by von Zittel (1883) and Fraas (1886); it was recombined as Lithaster jurassicus by Hess (1977) and Hess (1991).

Synonymy list
YearName and author
1876Pentaceros (Oreaster) jurassicus von Zittel p. 236 figs. fig. 372a
1883Pentaceros jurassicus von Zittel p. 461 figs. fig. 333a
1886Pentaceros jurassicus Fraas pp. 252-254 figs. pl. 30, fig. 5-6
1977Lithaster jurassicus Hess pp. 322-327 figs. fig. 1-3
1991Lithaster jurassicus Hess p. 889

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

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 1977Form large, stellate (R=72mm). Long and slender arms (R/r ratio equals 3.8). 21 to 23 pairs of marginal plates per alf-arc. A single row of abactinal plates in the arm, vis-à-vis of marginal plates. Abactinal plates large, thick, tabulate, strongly imbricated at the base. Ventro-lateral area restricted to the disk.