Qual a diferença entre lesma, caracol e caramujo?

Lesmas, caracóis e caramujos costumam ser confundidos. Todos são moluscos gastrópodes, mas a principal diferença entre eles está na concha.

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A lesma não tem concha externa visível ou possui apenas uma estrutura vestigial, muitas vezes interna. Ela pode viver em terra ou no mar.

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Caracóis e caramujos têm concha. Na linguagem popular, caracol é o terrestre, e caramujo, o aquático.

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Juntos, esses animais somam cerca de 75 mil espécies. Há fósseis de 500 milhões de anos. São 30 a 40 famílias de lesmas e cerca de 400 de caramujos e caracóis.

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Nas espécies terrestres, a cabeça tem quatro tentáculos retráteis: dois para a visão e dois para o tato e o olfato.

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Para se mover, eles secretam um muco que ajuda no deslizamento. Eles também fazem movimentos ondulatórios, como as cobras e as minhocas.

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Alguns trazem riscos: o caramujo-gigante-africano pode transmitir nematódeos que causam doenças. Já o escargot é uma iguaria da culinária.

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