Heteroscleromorpha [subclass]
(214 species)

Poecilosclerida [order] (62)

Acarnidae [family] (7)

Chondropsidae [family] (6)

Coelosphaeridae [family] (7)

Crambeidae [family] (1)

Crellidae [family] (1)

Desmacididae [family] (1)

Hymedesmiidae [family] (6)

Iotrochotidae [family] (1)

Microcionidae [family] (20)

Mycalidae [family] (9)

Tedaniidae [family] (3)