Valvata tricarinata
| Valvata tricarinata | |
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| Drawing: apertural view of shell of Valvata tricarinata | |
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| Species: | V. tricarinata
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| Binomial name | |
| Valvata tricarinata Say, 1817
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Cyclostoma tricarinata Say, 1817 (original combination) | |
Valvata tricarinata, common name the three-ridge valvata or threeridge valvata, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails.
Distribution
This species occurred in the Northwest Atlantic Ocean and along the Gulf of Maine.
Shell description
There is great variation in the degree of carination of the shell.[2]
Paleontology
Valvata tricarinata is abundant in nearly all lacustrine and fluviatile deposits in North America of the Pleistocene period. The fossil shells are more variable than the Recent ones.[2] There were described eight forms or subspecies.[2]
References
This article incorporates public domain text from the reference.[2]
- ^ Seddon, M.B. & Lepitzki, D. 2017. Valvata tricarinata. The IUCN Red List of Threatened Species 2017: e.T189129A80973880. https://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T189129A80973880.en. Downloaded on 11 January 2019.
- ^ a b c d Frank C. Baker. July 1921. New forms of Pleistocene molluks of Illinois. The Nautilus, volume 35, number 1, 22–24.
- Turgeon, D.D., et al. 1998. Common and scientific names of aquatic invertebrates of the United States and Canada. American Fisheries Society Special Publication 26
External links