Adriatic T. nitida can have a very prominent labial varix (1), and sometimes, like Atlantic T. reticulata, have a substantial opaque white parietal lip (2) with tubercles/teeth (3).
Croatia, Adriatic. September 2016. © A. Petani.
Adriatic T. nitida can have a very prominent labial varix (1), and sometimes, like Atlantic T. reticulata, have a substantial opaque white parietal lip (2) with tubercles/teeth (3).
Croatia, Adriatic. September 2016. © A. Petani.