Amnicola dalli
Amnicola dalli, common name the peninsula amnicola, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Amnicolidae.
The specific epithet is in honor of W. H. Dall.
Subspecies
Amnicola dalli johnsoni North Peninsula Amnicola -Shell description
The shell is narrowly umbilicate, obtusely conical, and lustrous with a smooth surface and a light brown or greenish-horn coloration. It exhibits 4 convex whorls that gradually increase in size, separated by a regularly impressed, moderately deep suture.The aperture is rounded anteriorly and somewhat angular posteriorly, with a bluish-white interior. The outer lip is simple, sharp, and connected by a thickened callus. The columella is moderately reflexed.
The width of the shell is 2.30 mm. The height of the shell is 3.50 mm.
Anatomy
The jaw is thin and membranaceous.The formula off the radula is: 34-23-7- -7-23-34.