Parathyonidium Heding, 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

Parathyonidium Heding, 1954

Parathyonidium Heding, 1954 in Heding and Panning 1954.

Diagnosis (see Description of Parathyonidium incertum Heding, 1954 below)

Type species. Parathyonidium incertum Heding, 1954 (type locality South Georgia) (monotypic)

Remarks. Albert Panning (in Heding and Panning 1954) noted that his Copenhagen friend and colleague Sven Heding died before the publication of their anticipated Discovery Report, where he planned to describe the new genus Parathyonidium and species Parathyonidium incertum . Albert further noted that Elizabeth Deichmann had taken over work on the Discovery specimens, but had agreed that Albert would publish the description as written by Sven. Albert assigned the authorship of the new taxa to Heding, and the descriptions were published in Heding and Panning (1954). A Discovery Report on holothuroids was never published. The Discovery holothuroid collection is currently in Museum Victoria where most specimens have now been determined. Mark O’Loughlin and his colleagues hope to complete a Discovery Report on holothuroids. Here we have emended the diagnosis of Parathyonidium Heding, 1954 to more fully describe the tentacle form and arrangement, calcareous ring, gonad tubule arrangement, and ossicles.