Bonelliidae

Biseswar, Ramlall, 2009, The geographic distribution of echiurans in the Atlantic Ocean (Phylum Echiura), Zootaxa 2222, pp. 17-30 : 20

Family Bonelliidae

Description. Echiurans with marked sexual dimorphism. Female with sac-like trunk with a proboscis that may be either truncate or bifid; gonoducts usually one or two; ventral setae, usually either two or absent; anal vesicles usually branched. Male, usually minute, degenerate and parasitic in or on the female.

The zoogeographical composition and bathymetric range of the bonelliids from the Atlantic are given in Table 1. The localities in the Atlantic where the different species of bonelliids have been collected are indicated in maps 1–3.