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Frizzellus

Holothuroidea - Etheridgellidae

Taxonomy
Frizzellus was named by Hampton (1958) [Sepkoski's age data: Tr J Oxfo Sepkoski's reference number: 2]. It is not extant. It is considered to be a form taxon. Its type is Frizzellus irregularis.

It was assigned to Etheridgellidae by Hampton (1958), Deflandre-Rigaud (1962), Frizzell and Exline (1966) and Kozur and Sadeddin (1990); and to Arthrochirotida by Sepkoski (2002).

Synonymy list
YearName and author
1958Frizzellus Hampton pp. 309-310
1962Frizzellus Deflandre-Rigaud p. 65
1966Frizzellus Frizzell and Exline p. U665
1990Frizzellus Kozur and Sadeddin p. 354
2002Frizzellus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumEchinodermata
classHolothuroidea()
familyEtheridgellidae
genusFrizzellus

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
J. S. Hampton 1958Imperforate, flat to concavo-convex plates (disks), with irregular hexagonal to subcircular outline and denticulate margin; surface ornamentation of minute granular projections.