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Acanthocystites

Eocrinoidea -

Taxonomy
Acanthocystites was named by Barrande (1887) [Sepkoski's age data: Cm uMid-l].

It was assigned to Eocrinoidea by Sprinkle (1973); and to Gogiida by Sepkoski (2002).

Synonymy list
YearName and author
1887Acanthocystites Barrande
1973Acanthocystites Sprinkle
2002Acanthocystites Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumEchinodermata
subphylumBlastozoaSprinkle 1973
classEocrinoideaJaekel 1918
genusAcanthocystitesBarrande 1887

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
J. Sprinkle 1973Eocrinoids with a large, elongate, irregularly plated calyx having modified epispires (sutural pores) and very numerous long brachioles attached to the trim of the summit. Base of calyx and possible attachment appendage (holdfast or stem) unknown. Numerous epispires are modified by having a central thin lid apparently on the plate interior(?) that closes off the center of the epispire while leaving the 2 ends open. Brachioles apparently normal, at least 16 in number, with 1 set of toothed and imbricate cover plates present. Calyx plates irregularly arranged with no evidence of pentameral symmetry; arrangement of ambulacral system and other summit structures unknown. Middle Cambrian, Jince Beds, Czechoslovakia