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Discus rotundatus, Common name Rotund Disc, is a species of small, air-breathing, land snail, a terrestrial pulmonate gastropod mollusk in the family Discidae, the disk snails.
The umbilicus is extremely wide and perspectivically open (like Discus rotundatus).
An umbilicus can vary from very narrow and punctured, as found in Petasina unidentata, to wide and shallow, such as the deep and wide depression in the rounded snail (Discus rotundatus).
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