Kingdom Animalia Linnaeus, 1758 - animals Phylum Echinodermata Bruguière, 1789 - echinoderms Subphylum Eleutherozoa Bell, 1891 Class Holothuroidea (de Blainville, 1834) - sea cucumbers Subclass Apodacea Genus Caudina Stimpson, 1853 Genus Leptosynapta Verrill, 1867 Genus Molpadia Cuvier, 1817 Genus Synapta Eschscholtz, 1829