New dendrochirotid sea cucumbers from northern Australia (Echinodermata: Holothuroidea: Dendrochirotida) Author P. Mark O’Loughlin Author Melanie Mackenzie Author Didier Vandenspiegel text Memoirs of Museum Victoria 2014 2014-12-31 72 5 23 journal article 29824 10.5281/zenodo.1298027 b234abf6-4127-4bbe-a4da-07eb7316d36b 1447-2554 1298027 Triasemperia O’Loughlin gen. nov. Zoobank LSID. http://zoobank.org:act:5140E273-FE8D-4F8A- A66D-F94B74771FE8 Diagnosis. Dendrochirotid species with mouth anterior, anus posterior, lacking anal teeth; tube feet scattered over body; 20 dendritic tentacles, 15 large, 5 inner small; calcareous ring composite, comprising small calcareous pieces, radial and inter-radial composite plates adjoin to create tubular ring, radial plates elongate with thin posterior distal prolongations adjoining inter-radial plate elongations, radial plates with median division for most of the length, inter-radial plates with deep posterior notch; ossicles throughout the body wall tables, discs triangular, typically with 6 large marginal knobs and 6 small perforations, spires with three pillars; tentacles with rods, rosettes, few tables. Type species. Triasemperia stola O’Loughlin sp. nov. (monotypic). Figure 7. Holotype specimen of Massinium keesingi O’Loughlin sp. nov. (NMV F203008). A, dorsal view of preserved holotype (40 mm long); B, ventral view of preserved holotype; C, sketch of dorso-lateral view of the holotype; insert with sketch of the calcareous ring; D, photo of the calcareous ring of the holotype. Etymology . From the Greek tria (three), referring to the three pillars of the table spires, with semperia , referring to the subfamily Semperiellinae and in turn to the esteemed biologist Carl Gottfried Semper. Remarks . The new genus Triasemperia is referred to the subfamily Semperiellinae on the bases of the presence of 20 dendritic tentacles and composite tubular calcareous ring. The new genus is distinguished from the other genera of the Semperiellinae by the presence of table spires with three pillars.