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Achradocystites
Taxonomy
Achradocystites was named by Volborth (1870). Its type is Achradocystites grewingkii.
It was assigned to Comarocystitida by Sepkoski (2002); and to Achradocystitidae by Rozhnov (2017).
It was assigned to Comarocystitida by Sepkoski (2002); and to Achradocystitidae by Rozhnov (2017).
Species
A. grewingkii (type species), A. schmidti
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.
G. †Achradocystites Volborth 1870
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†Achradocystites grewingkii Rozhnov 2017
†Achradocystites schmidti Hecker 1958
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. V. Rozhnov 2017 | Large elon- gate-ovate theca with large flat tegmen of five large oral plates and one small plate, with the hydropore on its border; low basal circlet of three plates; large mid- dle region between tegmen and basals built of small pyramidally convex plates, each with internal pore, and systems of radial and tangential canals. Small anal pyramid in upper half of theca near its shoulder approximately in ray C or interray BC. Three large brachioles in rays B, D, and E and possessing brachi- olets extending to the right or left of each brachiolar. Stem wide, of low columnals with trilobed axial canal. Stem and orals sometimes with ornamentation of small tubercles. |