Family Hexatrygonidae Heemstra & Smith 1980

Hexatrygonidae Heemstra & Smith 1980:1 [ref. 2081] (family) Hexatrygon

Hexatrematobatidae Chu & Meng in Chu et al. 1981:111 [ref. 4841] (family) Hexatrematobatis [family authorship inferred from genus and species authorship, see p. 116; correct stem is Hexatrematobatid-]