Holothuroidea - Apodida - Achistridae

Alternative combinations: Achistrulum issleri, Achistrum (Achistrum) issleri, Ancistrum issleri

Full reference: C. Croneis and J. McCormack. 1932. Fossil Holothuroidea. Journal of Paleontology 6(2):111-148

Belongs to Achistrum according to A. S. Henderson et al. 1992

Sister taxa: Achistrum beckmanni, Achistrum brevis, Achistrum brevis, Achistrum coloculum, Achistrum frizzelli, Achistrum gamma, 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

Ecology: epifaunal detritivore