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

species has even been observed foraging underwater for aquatic snail in Hawaii (Kinzie, 1992).
This species has been observed in a variety of habitats, in woods dominated by salt cedar (Davis,
Perez & Bennett, 2004), roadsides, edges of marsh, and disturbed urban areas (Hubricht, 1985).
Euglandina singleyana (placed in the genus Glandina by Schileyko) is a large snail (up to
51 mm length) distributed across Central Texas ranging from Galveston County to Val Verde
County with a few specimens collected in Mexico near the Texas border (Perez & Strenth,
2003). In the eastern part of its range this snail is found under rocks and logs in wooded stream
valleys, in the western part of the range it is found under fallen Yucca and under rocks in desert
shrub habitat dominated by Lechugilla (Fullington & Pratt, 1974). These snails are active on
humid days, early morning, or after rain. They can be observed following the trails of prey snails
and often leave small piles of empty shells of their favorite prey near rocky hiding places (KEP
pers obs., Humboldtiana spp.). E. texasiana is a calciphile, found in much wetter places where it
stays damp. This species can also be found crawling on buildings in urban areas. The range of
this species is the Rio Grande Valley of Texas south throughTamaulipas and San Luis Potosi. E.
texasiana is smaller than the other two U.S. Euglandina species reaching maximum of ~34 mm
length (Pilsbry, 1946).
Pseudosubulina cheatumi is the northernmost respresentative of a largely tropical group.
This species is restricted to leaf litter and stabilized talus in bottoms of canyons as well as in the
Evergreen Zone in the Chisos Mountains, Big Bend National Park, Texas (Fullington & Pratt,
1974).
TAXON AUTHOR
G-
RANK DISTRIBUTION
Euglandina rosea (Ferussac, 1818) G5 AL, CA, FL, GA, HI, LA, MS, NC, SC, TX
Euglandina singleyana (W.G. Binney, 1892) G3 TX
Euglandina texasiana (Pfeiffer, 1857) G1G2 TX
Pseudosubulina cheatumi Pilsbry, 1950 G1 TX
Strobilopsidae
Jochen Gerber, Field Museum of Natural History
These snails are very small with uniformly brownish shells. Shells are usually lowconical
or beehive-shaped with a narrow umbilicus, and usually sculptured with conspicuous
transverse ribs. One North American species (Strobilops hubbardi) is depressed helicoid with a
wide umbilicus; its shell surface has weakly developed, dense riblets. The aperture is dilated in
all species and more or less thickened. As a family characteristic the strobilopsids possess a
number of lamellae inside the last whorl. Number, shape and arrangement of these lamellae are
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