Sipuncula is a feminine variant of the now-obsolete genus name Sipunculus, itself a variant of the Latin siphunculus ("little tube"), a diminutive of sipho from Greek σίφων (síphōn, "tube, pipe").
The Swedi… See more

Sipunculans are worms ranging from 2 to 720 mm (0.1 to 28.3 in) in length, with most species being under 10 cm (4 in). The sipunculan body is divided into an unsegmented, bulbous trunk and a narrower, a… See more

All sipunculid worms are marine and benthic; they are found throughout the world's oceans including polar waters, equatorial waters and the abyssal zone, but the majority of species occur in shallow water, where they … See more