T. Levantina is different from T spongicola, even if it belongs to the same
group of Trivia. It has heavier ribs and less numerous than T. levantina.
There is a work devoted to it:
The Trivia spongicola complex, with the description of a new species
(Caenogastropoda; Trividae) C. Smriglio, P. Mariottini & G.
Buzzuro Bollettino Malacologico 32, 161, 1997
Enzo Campani
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Enzo Campani
Coordinatore del
Gruppo Malacologico Livornese