A group of land snails that lack stalked eyes, instead having eyes located at the base of their tentacles.
From Greek 'basis' (base), 'omma' (eye), and '-phora' (bearing or carrying), literally meaning 'base-eye-bearing.'
While many snails have eyes at the tips of long tentacles, basommatophora put their eyes at the base—this simple anatomical difference creates such distinct snails that biologists made it a major classification group.
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