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Acanthocystites
Taxonomy
Acanthocystites was named by Barrande (1887) [Sepkoski's age data: Cm uMid-l].
It was assigned to Eocrinidae by Beaver et al. (1967); to Eocrinoidea by Sprinkle (1973); and to Gogiida by Sepkoski (2002).
It was assigned to Eocrinidae by Beaver et al. (1967); to Eocrinoidea by Sprinkle (1973); and to Gogiida by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1887 | Acanthocystites Barrande |
| 1967 | Acanthocystites Beaver et al. p. S478 |
| 1973 | Acanthocystites Sprinkle |
| 2002 | Acanthocystites Sepkoski |
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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. †Acanthocystites Barrande 1887
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Sprinkle 1973 | Eocrinoids 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 |