Family Synallactidae Ludwig 1894 (sea cucumber)
Holothuroidea - Aspidochirotida
Full reference: H. L. Ludwig. 1894. The Holothurioidea. XII. Report on an Exploration off the west coasts of Mexico, Central and South America, and off the Galapagos Islands, in charge of Alexander Agassiz, by the US. Fish Commission Steamer ALBATROSS during 1891, Lt. ZL. Tanner USN. Memoirs of the Museum of Comparative Zoology, Harvard 17(3):1-183
Parent taxon: Aspidochirotida according to M. Reich 2010
Sister taxa: Bathysynactites, Collbatothuria, Holothuriidae, Holothuropsis, Ornaticannula, Parvispina, Stichopodidae
Subtaxa: Bracchiothuria, Tribrachiodemas
Ecology: epifaunal deposit feeder-suspension feeder