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Hesperocystis
Taxonomy
Hesperocystis was named by Sinclair (1945) [Sepkoski's age data: O Cara-l]. Its type is Hesperocystis deckeri.
It was assigned to Glyptocystitidae by Sprinkle (1982); and to Rhombifera by Sepkoski (2002).
It was assigned to Glyptocystitidae by Sprinkle (1982); and to Rhombifera by Sepkoski (2002).
Species
H. deckeri (type species)
Synonymy list
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Sprinkle 1982 | Thecal shape ovoid to globular, summit slightly domed and tilted toward periproct, base subconical; BB narrow with small stem facet, ILL circlet closed, LL circlet open, R5 very small; periproct small, surrounded by 4 thecal plates (IL4, L4, L5, and R4); 20 to 22 rhombe and demirhombs; ambulacra medium length, extending short distance down theca in RR sinuses, 1 to 4 brachioles per flooring plate set, 1 to 3 brachioles on each of 5 00; stem small, not greatly enlarged proximally, lacking alternating columnals. |