Abstract
A new genus of macrodasyid gastrotrich collected from a low energy beach at Nahant, Massachusetts [USA] is described. DOLICHODASYS elongatus gen. et. sp. nov. is distinguished by its lack of lateral adhesive tubles, the presence of a single caudal tubule in the adult, and the possession of an aberrant type of sperm with associated refractile bodies. A prominent posterior glandular bursa is present. Juveniles resemble the adult in general form but possess 4 posterior adhesive tubules.

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