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Ridersia

Eocrinoidea - Ridersiidae

Taxonomy
Ridersia was named by Jell et al. (1985) [Sepkoski's age data: Cm Fran Sepkoski's reference number: 805]. It is not extant. Its type is Ridersia watsonae. It is the type genus of Ridersiidae.

It was assigned to Ridersiidae by Jell et al. (1985); and to Ascocystitida by Sepkoski (2002).

Synonymy list
YearName and author
1985Ridersia Jell et al. p. 197
2002Ridersia Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumEchinodermata
subphylumBlastozoaSprinkle 1973
classEocrinoideaJaekel 1918
familyRidersiidae
genusRidersia

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
No diagnoses are available