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A reversed coiled Neocyclotus prominulus (d'Orbigny) (Gastropoda, Prosobranchia, Cyclophoridae) from Grande Island, Rio de Janeiro, Brazil

Enrolamento reverso em Neocyclotus prominulus (d'Orbigny) (Gastropoda, Prosobranchia, Cyclophoridae) de Ilha Grande, Rio de Janeiro, Brasil

The first case of reversed coiled shell of Neocyclotus prominulus is reported here. One specimen out of 282 of Neocyclotus prominulus from Grande Island, is sinistral (0.35%). It is represented by a female reaching 3.5 whorls and 0.82 cm of maximum diameter.

Right-left reversal; sinistral; terrestrial gastropods


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