Holothuroidea - Apodida - Achistridae
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 J. Bohaty and H.-G. Herbig 2010
See also Boczarowski 2001, Deflandre-Rigaud 1962, Frizzell and Exline 1955, Frizzell and Exline 1966, Gilliland 1992, Gilliland 1993, Hampton 1958, Krainer and Mostler 1997, Langenheim and Epis 1957, Mostler and Rahimi-Yazd 1976, Pawson 1966, Reich 1999 and Wernlund 1977
Sister taxa: Calcancoridae, Chiridotidae, Holothuriopsis, Myriotrochidae, Myriotrochus, Porachistrum, Synaptidae, Synaptitidae
Type: Achistrum
Ecology: epifaunal detritivore
Distribution:
• Cretaceous of Poland (1 collection)
• Jurassic of Austria (2), Egypt (3), France (4), Germany (1), India (1), Poland (41), Switzerland (1), the United Kingdom (16)
• Triassic of Austria (2), Hungary (3), Iran (1), Poland (1), Slovakia (1), Slovenia (1), Thailand (1), Turkey (1)
• Permian of Germany (1), Iran (1), United States (4: Kansas, Texas)
• Carboniferous of Afghanistan (1), United States (11: Arizona, Indiana, Kentucky, Missouri, Montana, Nebraska, Texas)
• Devonian of Germany (1), Poland (11)
Total: 111 collections including 166 occurrences