Thyonidiella Heding and Panning, 1954

O’Loughlin, P. Mark, Barmos, Shari & VandenSpiegel, Didier, 2012, The phyllophorid sea cucumbers of southern Australia (Echinodermata: Holothuroidea: Dendrochirotida: Phyllophoridae), Memoirs of Museum Victoria 69, pp. 269-308 : 289

Thyonidiella Heding and Panning, 1954

Diagnosis (after Heding and Panning 1954). Dendrochirote holothuroids with 15 tentacles in 2 series, 10 large outer and 5 small inner; body covered with tube feet; calcareous ring with composite tapering posterior extensions comprising discrete single series of plates, arising principally from radial plates but sometimes also joined with inter-radial plate posterior extensions; body wall ossicles tables with 4-pillared spires, sometimes only present in juveniles; endplates with support plates, not support tables.

Type species. Thyonidiella tenera (Ludwig, 1875) (senior synonym of original type species Thyonidiella oceana Heding and Panning, 1954 ).

Other species. T. cherbonnieri Rowe and Richmond, 2004 ; T. drozdovi (Levin and Stepanov, 1999) ; T. exigua Cherbonnier, 1988 ; T. kungi O’Loughlin sp. nov.

Remarks. Rowe and Richmond (2004) commented in detail on genus Thyonidiella Heding and Panning, 1954 . They noted that Thyonidiella oceana Heding and Panning, 1954 is a junior synonym of Thyonidiella tenera (Ludwig, 1875) , and that Semperiella Heding and Panning, 1954 is a junior synonym of Thyonidiella Heding and Panning, 1954 . They further judged that Thyonidiella exigua was probably based on a juvenile specimen of Selenkiella paradoxa Cherbonnier, 1970 .