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Wellerocystis

Paracrinoidea - Platycystitida - Malocystitidae

Taxonomy
Wellerocystis was named by Foerste (1920) [Sepkoski's age data: O Cara-l Sepkoski's reference number: 706].

It was assigned to Malocystitidae by Parsley and Mintz (1975); and to Platycystitida by Sepkoski (2002).

Synonymy list
YearName and author
1920Wellerocystis Foerste
1975Wellerocystis Parsley and Mintz pp. 92 - 93
2002Wellerocystis Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumParacrinozoaParsley and Mintz 1975
classParacrinoideaRegnell 1945
orderPlatycystitida
familyMalocystitidae(Bather 1899)
genusWellerocystis

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
R. L. Parsley and L. W. Mintz 1975Theca oval to subconical, composed of c. 40 generally irregularly hexagonal plates arranged in nine uneven, vertical-oblique rows. Three basals present. Two epithecal arms split laterally, resulting in four, five, or six dextrally spiraled branches; food grooves lateral, on concave curvature of each branch arm lumens oval, extend length of arm; underarm thecal calluses prominent, grooved axially. Peristome at distal apex; posterior periproct closely adjacent. Column attachment offset antero-left laterally from bilateral plane of symmetry.