Bathybelidae is a family of sagittoideans in the order Aphragmophora. It consists of a single genus, Bathybelos Owre, 1973,Owre, H. B. (1973). A new chaetognath genus and species with remarks on the taxonomy and distribution of others. Bulletin of Marine Science, 23, 948–963. which consists of a single species, Bathybelos typhlops Owre, 1973. It is unusual for having a dorsal ganglion instead of the ventral ganglion of all other chaetognaths, alongside a neck-like structure. These are believed to be adaptations to the deep-ocean benthic habitat of the animal.
References