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

Information summarized from: NatureServe, Roth & Sadeghian (2006), Pilsbry (1939),
Northwest Forest Plan (2002), Sierra Nevada-Cascade Mountain Management Plan (1997), Roth
(2002).
TAXON AUTHOR
G-
RANK DISTRIBUTION
Monadenia callipeplus S.S. Berry, 1940 G1G2 CA
Monadenia chaceana S.S. Berry, 1940 G2 CA, OR
Monadenia churchi
Hanna and A.G. Smith,
1933 G2 CA
Monadenia circumcarinata (Stearns, 1879) G1 CA
Monadenia cristulata S.S. Berry, 1940 G1G2 CA
Monadenia fidelis (J.E. Gray, 1834) G4G5 AK, CA, OR, WA; Canada: BC
Monadenia infumata (Gould, 1855) G2G3 CA
Monadenia marmarotis S.S Berry, 1940 G1 CA
Monadenia mormonum (Pfeiffer, 1857) G2 CA
Monadenia scottiana S.S. Berry, 1940 G1G2 CA
Monadenia setosa Talmadge, 1952 G2 CA
Monadenia troglodytes Hanna and A.G.Smith, 1933 G1G2 CA
Monadenia tuolumneana S.S. Berry, 1955 G1 CA
Monadenia yosemitensis (Lowe, 1916) G1 CA
Bulimulidae
Kathryn E. Perez, Duke University
The Bulimulidae are a family of hundreds of species, mostly found in South America.
Shells are bulimoid in form and typically white or brown background color with grey or brown
streaks or stripes. The largest species reach ~40 mm in length.
The genus Drymaeus is restricted in the U.S. to Florida where these snails live on
trees, bushes, or herbaceous vegetation. The species in this genus are semi-arboreal and are
typically found estivating or crawling on vegetation (Hubricht, 1985).
Rabdotus is one of the characteristic snails of the arid and semi-arid regions of Texas and
adjacent Mexico (Fullington & Pratt, 1973). The species of Rabdotus occupy a range of habitats
from coastal plain scrubland to Chihuahuan desert. These snails are colonial and can reach high
densities locally and are often found crawling or estivating on tall grass, shrubs, mesquite brush,
on human build structures, or under rocks and other cover. They are typically active during
times of high humidity, at night, or after rain. In parts of their range after rainfall they have been
known to be active in high enough concentrations that slicks caused by smashed snails have
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