Parathyone Deichmann, 1957

Martins, Luciana & Tavares, Marcos, 2021, A new species of Parathyone (Holothuroidea: Dendrochirotida: Cucumariidae) from northeastern Brazil, with a key to species, Zootaxa 4985 (2), pp. 245-252 : 246

Genus Parathyone Deichmann, 1957

Emended diagnosis (modified from Prata et al., 2020). Small-medium-sized forms (up to 100mm long), Ten dendritic tentacles of equal size or ten dendritic tentacles, ventral pair reduced. Tube feet scattered over entire body. Calcareous ring lacking posterior processes; radial plates united to interradial plates along their entire length. Body wall ossicles: four holed to multilocular cups; multiperforated plates and knobbed buttons. Tentacles and introvert with cups knobbed on inner and outer faces. Ambulacral feet with supporting rods and end plate.

Type species. Parathyone surinamensis ( Semper, 1867) ; by original designation. Type locality: Surinam.

Species included (genera of the original combination are indicated within brackets). Parathyone surinamensis ( Semper, 1867) [ Thyone ], Parathyone suspecta ( Ludwig, 1875) [ Thyone ] (type locality: Barbados), Parathyone braziliensis ( Verrill, 1868) [ Thyone ] (type locality: Abrolhos, southern Bahia, Brazil) and Parathyone itapuaensis sp. nov. Thyone (Sclerodactyla) braziliensis Verrill, 1868 , was recently transferred to Parathyone by Prata et al. (2020).