A new species ofRetevirgula, Retevirgula akdenizaesp. n., was collected during the “Akdeniz ‘92” campaign at Datcha (Turkey) from a Posidonia meadow. It is characterized by autozooids with 13–16 spines, avicularia with one or two proximal spines and lacking a complete cross‐bar, kenozooids with some spines, ovicells with a longitudinal distal slit. The genusRetevirgula, hitherto never collected from the Mediterranean Sea, is represented by 13 species and one variety, and shows a distribution from warm temperate to tropical areas. Phylogenetic relationship ofR. akdenizaesp. n. with otherRetevirgulaspecies are at present obscure.