†unranked clade Paleochiridotidae Frizzell and Exline 1966

Holothuroidea - Apodida - Myriotrochidae

Full reference: D. L. Frizzell and H. Exline. 1966. Holothuroidea - Fossil Record. Treatise on Invertebrate Paleontology, Part U. Echinodermata 3. The Geological Society of America and The University of Kansas Press 2:U646-U672

Parent taxon: Myriotrochidae according to H. W. Kozur and H. Mostler 2008

See also Frizzell and Exline 1966, Gilliland 1993 and Wernlund 1977

Sister taxa: Acanthotheelia, Gagesiniotrochus, Hemisphaeranthos, Thalattocanthus, Trematrochus

Subtaxa: Acanthorota Acanthoschizorota Langepis Paleochiridota Rota Rotoides

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Distribution:

• Permian of United States (2: Texas collections)

• Carboniferous of United States (13: Arizona, Indiana, Missouri, Montana, Nebraska, Texas)

Total: 15 collections including 24 occurrences

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