The cursory dorsal mantle groove line is dissimilar to the shells general color pattern, completely devoid of lines, thus easily perceivable.
2.
The mantle groove ( the line or area where the two mantle flaps meet when they are fully extended ) is dissimilar to the shells general color pattern, and thus easily perceivable.
3.
The map cowry was named on the basis of its distinct color pattern, because of the longitudinal lines and the easily distinguishable and sinuous mantle groove, which creates a resemblance to ancient maps.
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