Ancotrema

Ancotrema
Ancotrema sportella ssp. sportella
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura clade Panpulmonata clade Eupulmonata clade Stylommatophora informal group Sigmurethra
Superfamily:	Rhytidoidea
Family:	Haplotrematidae
Genus:	Ancotrema H. B. Baker, 1931[1]

Ancotrema is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Haplotrematidae.

This genus is sometimes considered to be a subgenus of Haplotrema. Haplotrema and Ancotrema cannot be distinguished only on the basis of their shells, but can be distinguished on the basis of their detailed internal anatomy.[2]

The genus Ancotrema contains the following species:[3][4]

• Ancotrema hybridum (Ancey, 1888); Oregon lancetooth
• Ancotrema sportella (Gould, 1846); beaded lancetooth
• Ancotrema voyanum (Newcomb, 1865); hooded lancetooth
• Ancotrema zopherum Roth, 1990: dusky lancetooth

References

1. Baker, Horace B. 1931. Proc. Acad. Nat. Sci. Philadelphia 82: 405-409.
2. Pilsbry, Henry A. (1946). Land Mollusca of North America (North of Mexico). Acad. Nat. Sci. Philadelphia, Monograph 3, vol. 2(1): 225-230.
3. [1] Integrated Taxonomic Information System (ITIS) taxonomic database
4. [2] Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online).