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

caused cars to run off roads. Rabdotus are of interest to a wide range of fields as they have
signal specific habitat or environmental types and shells are found in large numbers at
archaelogical sites presumably they formed a food source for various cultures. There is a great
deal of taxonomic confusion surrounding the species of Rabdotus in the U.S. and a thorough
modern treatment is necessary.
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Drymaeus dominicus (Reeve, 1850) G2G3 FL
Drymaeus dormani (W.G. Binney, 1857) G2G3 FL
Drymaeus multilineatus (Say, 1825) G5 FL
Naesiotus christenseni
(W.B. Miller and Reeder,
1984) G1 AZ
Naesiotus nigromontanus (Dall, 1897) G5
Rabdotus alternatus (Say, 1830) G5 TX
Rabdotus dealbatus (Say, 1830) G5 AL, AR, IL, KS, KY, LA, MO, MS, NM, OK, TN, TX, WI
Rabdotus durangoanus (von Martens, 1893) G3G5 NM, TX
Rabdotus mooreanus (Pfeiffer, 1868) G5 AL, MS, OK, TX
Rabdotus pilsbryi (Ferriss, 1925) G5 TX
Carychiidae
Jochen Gerber, Field Museum of Natural History
Shells of the only carychiid genus found in North America, Carychium, are minute,
elongate, transparent or white, 1.2-2.5 mm high. They have expanded and often thickened
peristomes. A characteristic of the group is a columellar fold whose shape is species-specific. It
can be seen through the shell wall in transparent shells or can be studied by carefully breaking a
“window” into the body whorl. Snails in the genus Carychium are found in very moist to wet
habitats, such as floodplains, swamps, and moist woods under rotting logs or in leaf litter.
Carychium stygium is only found in caves.
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Carychium clappi Hubricht, 1959 G5 AL, GA, IN, KY, MD, NC, PA, SC, TN, VA, WV
CO, DE, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, NC,
NE, NJ, NM, NY, OH, OK, PA, SC, SD, TN, TX, VA, VT, WI, WV;
Carychium exiguum (Say, 1822) G5 Canada: AB, NB, NS, ON, QC, NF
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