The Discovery Expedition sea cucumbers (Echinodermata: Holothuroidea) Author O’Loughlin, P. Mark Marine Biology Section, Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia pmoloughlin@edmundrice.org text Memoirs of Museum Victoria 2016 2016-12-31 75 53 70 journal article 10.24199/j.mmv.2016.75.03 1447-2554 urn:lsid:zoobank.org:pub:7039F593-8FE2-4668-BBC9-E18F2D82F8F8 4. Psolus dubiosus Ludwig & Heding, 1935 CO1 phylogenetic data (Gustav Paulay pers. comm. ) strongly support a synonymy for Psolus arnaudi Cherbonnier, 1974 and Psolus cherbonnieri Carriol & Féral, 1985 with Psolus dubiosus Ludwig & Heding, 1935 . For Discovery Expedition specimens we have not attempted to distinguish the former from Psolus dubiosus .