The Recent Rissoidae of the Mediterranean Sea. Notes on the genus Onoba s.s. H. Adams et A. Adams, 1852 (Gastropoda Prosobranchia)

摘要

The Mediterranean species belonging to the genus Onoba H. Adams et A. Adams, 1852 as currently conceived, are reviewed. With the exception of O. semicostata (Montagu, 1803) and O. aculeus (Gould, 1841) that range mostly in the European North-Eastern Atlantic and are rarely found in the Western Medite rranean, this genus is repre sented by six species with rather limited ranges: O. dimassai Amati et Nofroni, 1991; O. josae Moolenbeek et Hoenselaar, 1987; O. guzmani Hoenselaar et Moolenbeek, 1987; O. tarifensis Hoenselaar et Moolenbeek, 1987; O. gianninii (Nordsieck, 1974) and O. oliverioi Smriglio et Mariottini, 2000. A further possibly undescribed species is figured. For all species comparative morphometrics are provided. Onoba josae Moolenbeek et Hoenselaar, 1987 is here recorded for the first time in Italy, with the easternmost locality in this range.