A Guide for Terrestrial Gastropod Identification - University of ...

Sagdidae
Jochen Gerber, Field Museum of Natural History
This family is distributed in Central America and the West Indies. A single species,
Lacteoluna selenina, is found in North America (S. Florida). It has a small (ca. 5 mm),
depressed, umbilicate, dull-white shell. The whorls are “shouldered”. The outer lip of the
aperture remaines straight and thin even in fully grown specimens.
They live in areas with some tree or shrub cover under rocks and plant debris.
TAXON AUTHOR
G-
RANK DISTRIBUTION
Lacteoluna selenina (Gould, 1848) G2 FL
Spiraxidae
Kathryn E. Perez, Duke University
There are only 4 species of the carnivorous snails in this family in the U.S. and Canada,
but several hundred species of several genera in Mexico, the Caribbean, Central and South
America. Euglandina rosea is a large (up to 76 mm length, up to 30 mm width), common snail
of the southeastern US and has been introduced to many places worldwide, often intentionally,
into CA as well as numerous Pacific Islands. The introductions of E. rosea rate as one of the
worst described cases of a failed attempt at biological pest control resulting in heavy predation
pressure on native land snails of those areas (Cowie, 2001; Lydeard, et al. 2004). In Florida they
can be found foraging for terrestrial snails on the ground, or in wet weather, climbing on the
stems and leaves of small trees, ~1 m off the ground (Davis, Perez & Bennett, 2004). This
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