Amnicola dalli
Template:Short description Template:Speciesbox
Amnicola dalli, common name the peninsula amnicola, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Amnicolidae. [1]
The specific epithet is in honor of W. H. Dall.
Subspecies
- Amnicola dalli johnsoni (Pilsbry, 1899) North Peninsula Amnicola - image
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.[2]
The width of the shell is 2.30 mm. The height of the shell is 3.50 mm.[2]
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Drawing of the apical view of the shell.
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Drawing of the lateral view of the shell.
Anatomy
The jaw is thin and membranaceous.[2]
The formula off the radula is:[2] 34-23-7- <templatestyles src="Fraction/styles.css" />3+1+3⁄1+1 -7-23-34.
Distribution
The type locality is mountain streams which are tributary to Pyramid Lake in northwestern Nevada.[2]
References
This article incorporates public domain text from reference.[2]
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- ↑ Template:WRMS species
- ↑ a b c d e f Call R. E. 1886. On certain recent, quaternary, and new fresh-water Mollusca. Proceeding Davenport Academy of Natural Sciences, volume V., page 2-4, plate I, figure 6. (Radula description and images of radula are by Charles Emerson Beecher.)
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External links
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