Redescription and first record of Cymbasoma tenue (Isaac, 1975) (Copepoda: Monstrilloida) in the Mediterranean Sea

Several male specimens of Cymbasoma tenue (Isaac, 1975) were found in zooplankton samples collected at Toulon Bay, on the French Mediterranean coast. This copepod has not been recorded since its original description more than 20 years ago, which was based on material collected in the Bristol Channel, England. Cymbasoma tenue is here redescribed based on examination of these specimens and of the type material. The taxonomic analysis of these specimens produced new morphological data for the species. This is the first record of the species in the Mediterranean and a latitudinal extension of its known geographical range.