SipunculidaeSipunculidae is a family of peanut worms.Species''Phascolopsis'' ''Phascolopsis gouldii''''Siphonomecus''Siphonomecus multicinctus Fisher 1947''Siphonosoma''Siphonosoma arcassonense Siphonosoma australe Siphonosoma boholense Siphonosoma cumanense Siphonosoma dayi Stephen 1942Siphonosoma funafuti Siphonosoma ingens Siphonosoma mourense Satô, 1930Siphonosoma rotumanum ''Siphonosoma vastum''''Sipunculus''Sipunculus indicus Peters, 1850Sipunculus lomonossovi Murina 1968Sipunculus longipapillosus Murina 1968Sipunculus marcusi Ditadi 1976Sipunculus mundanus Selenka and Bulow, 1883Sipunculus norvegicus Danielssen, 1869Sipunculus nudus Linnaeus, 1766Sipunculus phalloides Sipunculus polymyotus Fisher 1947Sipunculus robustus Keferstein 1865''Xenosiphon''Xenosiphon absconditus Saiz 1984 ''Xenosiphon branchiatus''