Clarkiella deichmannae O'Loughlin, 2009 accepted as Oloughlinia deichmannae (O'Loughlin, 2009) (original description)
Cucumaria (Semperia) bouvetensis Ludwig & Heding, 1935 accepted as Trachythyone bouvetensis (Ludwig & Heding, 1935) (source of synonymy)
Cucumaria (Semperia) ekmani Ludwig & Heding, 1935 accepted as Neopsolidium kerguelensis (Théel, 1886) (status source)
Cucumaria laevigata (Verrill, 1876) accepted as Pentactella laevigata Verrill, 1876 (basis of record)
Cucumaria serrata var. intermedia Théel, 1886 accepted as Pentactella intermedia (Théel, 1886) (status source)
Cucumaria serrata var. marionensis Théel, 1886 accepted as Pentactella marionensis (Théel, 1886) (status source)
Cucumaria squamata Ludwig, 1898 accepted as Trachythyone muricata Studer, 1876 (source of synonymy)
Echinocucumis kirrilyae O'Loughlin, 2009 (original description)
Neopsolidium kerguelensis (Théel, 1886) (basis of record)
Thyone recurvata Théel, 1886 accepted as Trachythyone muricata Studer, 1876 (source of synonymy)
Trachythyone baja Hernandez, 1987 accepted as Trachythyone bouvetensis (Ludwig & Heding, 1935) (source of synonymy)
Trachythyone cynthiae O'Loughlin, 2009 (original description)
Trachythyone mackenzieae O'Loughlin, 2009 (original description)

Antarctic Ocean for Trachythyone cynthiae O'Loughlin, 2009 
Tasmania for Clarkiella deichmannae O'Loughlin, 2009