Thyonidiidae Heding and Panning, 1954

O’Loughlin, P. Mark, Mackenzie, Melanie, Paulay, Gustav & VandenSpiegel, Didier, 2014, Four new species and a new genus of Antarctic sea cucumbers with taxonomic reviews of Cladodactyla, Pseudocnus, Paracucumidae and Parathyonidium (Echinodermata: Holothuroidea: Dendrochirotida), Memoirs of Museum Victoria 72, pp. 31-61 : 55

Family Thyonidiidae Heding and Panning, 1954

Diagnosis ( Smirnov 2012). Tentacles 15–25; plates of calcareous ring lacking segmented posterior extensions; ossicles tables with 2, 3 or 4 pillars, or plates ( Parathyonidium ), or reduced ( Patallus and Athyonidium ).

Remarks. Thyonidiinae Heding and Panning, 1954 was raised to family status by Smirnov (2012) who understandably suspected that the Thyonidiidae is polyphyletic, those genera with tables not related to those lacking tables.