Euchemotrema
| Euchemotrema | |
|---|---|
 | |
| Three views of a shell of Euchemotrema fraternum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura clade Panpulmonata clade Eupulmonata clade Stylommatophora informal group Sigmurethra |
| Superfamily: | Helicoidea |
| Family: | Polygyridae |
| Genus: | Euchemotrema Archer, 1939[1] |
Euchemotrema is a genus of small, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae.
Shell description
The shell of species in this genus is usually about 8 to 11 mm in diameter (about 3/8 inch). The shells are brown with a velvety surface, similar to that of Stenotrema, and, in fact, this genus is sometimes combined into Stenotrema.[2] These snails typically have a less complex aperture than Stenotrema: "without a tooth within the outer arc of the lip and with no notch in the basal lip".[2]
There are also peculiarities of the male anatomy that separate the two genera.
Distribution
Euchemotrema is widely distributed in eastern and central North America.
Species
This genus includes the following species and subspecies:[2][3][4]
- Euchemotrema cheatumi (R. W. Fullington, 1974)
- Euchemotrema fasciatum (Pilsbry, 1940)
- Euchemotrema fraternum (Say, 1824)
- Euchemotrema fraternum montanum (Archer, 1939)
- Euchemotrema hubrichti (Pilsbry, 1940) / Stenotrema hubrichti Pilsbry, 1940[5]
- Euchemotrema leai (Binney, 1841)
- Euchemotrema leai aliciae (Pilsbry, 1893)
- Euchemotrema wichitorum (Branson, 1972)
References
- ↑ Archer A. F. (1939). "A new section and a new subspecies of Stenotrema". Nautilus 52: 98-99.
- ↑ 2.0 2.1 2.2 Pilsbry, Henry A. 1940. Land Mollusca of North America (North of Mexico). Acad. Nat. Sci. Philadelphia, Monograph 3, vol. 1(2): 675-688.
- ↑ Euchemotrema at ITIS (Integrated Taxonomic Information System); accessed 18 Jan. 2008.
- ↑ Euchemotrema at ZipcodeZoo; accessed 18 Jan. 2008.
- ↑ Mollusc Specialist Group (1996). Stenotrema hubrichti. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.