Ophiuroidea

Alternative combination: Onychaster confragosus

Synonyms: Calyptactis demissus Miller 1891, Onychaster demissus Miller 1891

Full reference: S. A. Miller. 1891. Palaeontology. Advanced sheets to the Indiana Department of Geology and Natural Resources Annual Report 17:1-95

Belongs to Calyptactis according to P. Jell 1997

See also Miller 1891, Miller 1892, Miller 1892, Owen 1965, Schuchert 1915 and Spencer 1930

Sister taxa: Calyptactis perarmatus, Calyptactis spinosus

Ecology: slow-moving low-level epifaunal detritivore-suspension feeder

Distribution: found only at Inexact locality near Crawfordsville, unknown formation, Montgomery Co., Indiana (Carboniferous of Indiana)

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Specimen images are retrieved through the ePANDDA API.