Amnicola dalli
| Peninsula amnicola | |
|---|---|
| Drawing of an apertural view of the shell and operculum of Amnicola dalli | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Amnicolidae |
| Genus: | Amnicola |
| Species: | A. dalli
|
| Binomial name | |
| Amnicola dalli (Pilsbry & Beecher, 1892)
| |
| Synonyms | |
| |
Amnicola dalli, common name the peninsula amnicola, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Amnicolidae.[2]
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.[3]
The width of the shell is 2.30 mm. The height of the shell is 3.50 mm.[3]
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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.[3]
The formula off the radula is:[3] 34-23-7- 3+1+3⁄1+1 -7-23-34.
Distribution
The type locality is mountain streams which are tributary to Pyramid Lake in northwestern Nevada.[3]
References
This article incorporates public domain text from reference.[3]
- ^ NatureServe. "Amnicola dalli". NatureServe Explorer. Arlington, Virginia. Retrieved 2 March 2026.
- ^ Amnicola dalli (Pilsbry & Beecher, 1892). 23 January 2025. Retrieved through: World Register of Marine 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.)
External links
- Johnson, P. D.; Bogan, A. E.; Brown, K. M.; Burkhead, N. M.; Cordeiro, J. R.; Garner, J. T.; Hartfield, P. D.; Lepitzki, D. A. W.; Mackie, G. L.; Tarpley, T. A.; Tiemann, J. S.; Whelan, N. V.; Strong, E. E. (2013). "Conservation status of freshwater gastropods of Canada and the United States". Fisheries. 38 (6).
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