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- Rhopalocystidae

Rhopalocystis was named by Ubaghs (1963) [Sepkoski's age data: O Trem-u]. Its type is Rhopalocystis destombesi.

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

Synonymy list
YearName and author
1963Rhopalocystis Ubaghs
1973Rhopalocystis Sprinkle p. 110
2002Rhopalocystis Sepkoski, Jr.

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familyRhopalocystidaeUbaghs 1967
genusRhopalocystisUbaghs 1963

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.

J. Sprinkle 1973Calyx conical to club-shaped, composed of numerous thick adjacent plates showing fairly good pentameral symmetry and bearing circular or slightly elliptical epispires on their margins. Single very thick basal plate at based of calyx. Domed oral surface consists of central mouth, lateral anal pyramid, and 5 relatively short ambulacra with single plates bearing long biserial brachioles. Long, slowly tapering stem with 1-piece columnals attached to base of calyx. Early Ordovician (Upper Tremadocian), Morocco.