Holothuroidea - Apodida - Achistridae

Full reference: H. Mostler. 1971. Holothuriensklerite aus anisichen, karnischen und norishen Hallstätterkalken. Geologisch-Paläontologische Mitteilungen Innsbruck 1(1):1-30

Belongs to Achistrum according to H. Mostler 1971

Sister taxa: Achistrum beckmanni, Achistrum brevis, Achistrum coloculum, Achistrum frizzelli, Achistrum gamma, Achistrum issleri, Achistrum longirostrum, Achistrum ludwigi, Achistrum monochordata, Achistrum multiperforatum, Achistrum nicholsoni, Achistrum permianum, Achistrum pulchrum, Achistrum triassicum, Achistrum tuto, Achistrum varicum, Achistrum (Achistrum) brownwoodensis, Achistrum (Cancellrum) bicordata, Achistrum (Cancellrum) pilgrimi, Achistrum (Cancellrum) meltonensis, Achistrum (Cancellrum) britanica, Achistrum (Cancellrum) warboysensis, Achistrum (Cancellrum) trichordata, Aduncrum cordatum

Type specimen: Its type locality is Meadel Ditch Quarry, which is in a Kinderhookian offshore mudstone/limestone in the Rockford Limestone Formation of Indiana

Ecology: epifaunal detritivore