Valvata tricarinata
| Valvata tricarinata | |
|---|---|
 | |
| Drawing: apertural view of shell of Valvata tricarinata | |
| NE[1] | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia informal group Lower Heterobranchia |
| Superfamily: | Valvatoidea |
| Family: | Valvatidae |
| Genus: | Valvata |
| Species: | V. tricarinata |
| Binomial name | |
| Valvata tricarinata Say, 1817 | |
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]
- 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
This article is issued from Wikipedia - version of the 7/20/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.