Trachythyone is a genus of sea cucumbers in the family Cucumariidae.
Species The following species are recognised in the genus Trachythyone: Trachythyone candida O'Loughlin & O'Hara, 1992 Trachythyone crassipeda Cherbonnier, 1961 Trachythyone flaccida Thandar, 2013 Trachythyone glaberrima (Semper, 1869) Trachythyone glebosa O'Loughlin & O'Hara, 1992 Trachythyone lechleri (Lampert, 1885) Trachythyone macphersonae Pawson, 1962 Trachythyone maxima Massin, 1992 Trachythyone muricata Studer, 1876 Trachythyone nina (Deichmann, 1930) Trachythyone peruana (Semper, 1868)
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