Euchemotrema

Euchemotrema is a genus of small, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae.

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]

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
  1. Archer A. F. (1939). "A new section and a new subspecies of Stenotrema". Nautilus 52: 98-99.
  2. Pilsbry, Henry A. 1940. Land Mollusca of North America (North of Mexico). Acad. Nat. Sci. Philadelphia, Monograph 3, vol. 1(2): 675-688.
  3. Euchemotrema at ITIS (Integrated Taxonomic Information System); accessed 18 Jan. 2008.
  4. Euchemotrema at ZipcodeZoo; accessed 18 Jan. 2008.
  5. Mollusc Specialist Group (1996). Stenotrema hubrichti. 2006 IUCN Red List of Threatened Species. Archived June 27, 2014, at the Wayback Machine Downloaded on 7 August 2007.
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