†family Calcancoridae Frizzell and Exline 1955 (sea cucumber)
Holothuroidea - Apodida - Calcancoridae
Full reference: D. L. Frizzell and H. Exline. 1955. Monograph of fossil holothurian sclerites. Bulletin of the Missouri University School of Metallurgy and Mines, Technical series 89:1-204
Parent taxon: Apodida according to D. L. Pawson 1966
See also Deflandre-Rigaud 1962, Frizzell and Exline 1955 and Frizzell and Exline 1966
Sister taxa: Achistridae, Chiridotidae, Holothuriopsis, Myriotrochidae, Myriotrochus, Porachistrum, Synaptidae, Synaptitidae
Subtaxa: Calcancoroidea Costigerites
Ecology: epifaunal detritivore
Distribution: found only at Vaches Noires Cliff, stratigraphic bed unknown (Jurassic of France)