At about 1/10 of an inch in diameter, the Suppressed Vitrinella, Cyclostremiscus suppressus (Dall, 1889), is one the many true micromollusks found on Sanibel and Captiva. A member of the family Tornidae, it has a circular, puck-shaped shell with three distinctive keels around the shell periphery. Well-defined grooves separate the keels from each other. The Suppressed Vitrinella is usually opaque-white or slightly translucent (shells of recently dead individuals). Its Latin specific name, supressus, in this case means “pushed down” or “flattened,” an allusion to typical shell shape.
![The Suppressed Vitrinella, Cyclostremiscus suppressus, from Sanibel. Photo by José H. Leal.](https://static.wixstatic.com/media/7f077a_d8e30dc19905475f930dbe1453f2399d~mv2_d_3000_2712_s_4_2.jpg/v1/fill/w_147,h_133,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/7f077a_d8e30dc19905475f930dbe1453f2399d~mv2_d_3000_2712_s_4_2.jpg)
The Suppressed Vitrinella, Cyclostremiscus suppressus, from Sanibel. Photo by José H. Leal.