Physa skinneri, common name the glass physa, is a species of freshwater snail, an aquatic gastropod mollusc in the family Physidae.
| Physa skinneri | |
|---|---|
| |
| Physa skinneri, live | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Superorder: | Hygrophila |
| Family: | Physidae |
| Genus: | Physa |
| Species: | P. skinneri
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| Binomial name | |
| Physa skinneri Taylor, 1954
| |
Description
editThe shell of Physa skinneri is thin, narrowly ovoid, to ovoid-fusiform, with an obtusely rounded apex. The spire is blunt with up to four weakly convex whorls separated by a shallow, broadly elongated suture. Maximum shell length is about 8.8 mm (5.2 mm wide). The aperture is about 60% of the overall shell length, elongate-oval, rounded anteriorly, acute posteriorly, widest about a third of the length from the anterior end. Outer lip thin, sharp, sometimes with a white band of callus thickening within, convex in the direction of growth.[1]
Distribution
editThis species occurs in:
- Canada and the northern United States.[2] Museum specimens[3][4](Academy of Natural Sciences, Philadelphia; Invertebase Portal Collection) are known from Alaska, Maine, Massachusetts, New York, Pennsylvania, Ohio, Iowa, Michigan, North and South Dakota, Montana, Colorado, Wyoming, Utah, and Nevada. The holotype specimen (University of Michigan Museum of Zoology #181292) was a fossil from Beaver Co., Oklahoma (Taylor 1954).[5] The species may be Holarctic in distribution based on shells found in Ukraine (Degtyarenko, E. and V. Anistratenko 2011).
- Montana USA[2][6]
- Utah, USA[7]
References
edit- ^ Taylor, D.W. (2003). "Introduction to Physidae (Gastropoda: Hygrophila). Biogeography, classification, and morphology". Revista de Biología Tropical. 51 (Supplement 1): 1–287. PMID 15260168.
- ^ a b "Physa skinneri". NatureServe, accessed 1 September 2011.
- ^ "ANSP Malacology Collection". clade.ansp.org. Retrieved 2023-01-30.
- ^ "Invert-E-Base Portal Collection Search Parameters". www.invertebase.org. Archived from the original on 2023-01-30. Retrieved 2023-01-30.
- ^ Taylor, D.W. (1954). "A new Pleistocene fauna and new species of fossil snails from the high plains". Occasional Papers of the Museum of Zoology, University of Michigan. 557: 1–16 – via University of Michigan.
- ^ "Physas". Montana Nature Heritage Program. Retrieved 2011-07-22.
- ^ "Physa skinneri". Utah Division of Wildlife Resources. Archived from the original on December 30, 2016. Retrieved May 18, 2017.
Further reading
edit- (in Russian) Degtyarenko E. & Anistratenko V. (2011). "Обитает ли Physa skinneri Taylor, 1954 (Mollusca: Gastropoda: Physidae) в Украине? [Does Physa skinneri Taylor, 1954 (Mollusca: Gastropoda: Physidae) inhabit Ukraine?]" Ruthenica 21(2): 89-94. PDF.
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