[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Echinodermata Bruguière, 1789 - echinoderms
     Class Holothuroidea (de Blainville, 1834) - sea cucumbers
       Order Elasipodida Théel, 1882
         Family Elpidiidae Théel, 1882
           1 Genus Achlyonice Théel, 1879
           2 Genus Amperima Pawson, 1965
           3 Genus Ellipinion Herouard, 1926
           4 Genus Elpidia Théel, 1876
           5 Genus Irpa Danielssen & Koren, 1878
           6 Genus Kolga Danielssen & Koren, 1879
           7 Genus Peniagone Théel, 1882
           8 Genus Penilpidia Gebruk, 1988
           9 Genus Psychroplanes Gebruk, 1988