Carychium mexicanum Pilsbry, 1891 Southern Thorn

Carychium mexicanum Pilsbry, 1891 Southern Thorn

Near Florida Caverns State Park, Marianna, Jackson Co., Florida (average size is 1.75 mm.) Two Hundred eighty three specimens are pictured.

Franklin D. Roosevelt (U. S. 32nd president), pictured above on the dime as a size comparison for the Carychium gaggle, had an elk, a cat, two lizards, a fish, an amphipod, and five mollusks named after him - the mollusks being:
Conus roosevelti Bartsch and Rehder, 1939 [= C. tiaratus G. B. Sowerby I, 1833 fide Keen, 1971: 663]
Peasiella roosevelti Bartsch and Rehder, 1939 [= Nodilittorina porcata (Philippi, 1846) fide Reid, 1989: 53]
Prunum roosevelti (Bartsch and Rehder, 1939) [as Marginella]
Terebra roosevelti Bartsch and Rehder, 1939 [= T. maculata (Linnaeus, 1758) fide Cernohorsky and Bratcher, 1987: 46]
Octopus roosevelti Stuart, 1941

The enid landsnail, Cerastus roosevelti (Dall, 1910) [as Buliminus] was probably named for Theodore Roosevelt

Bartsch, P. and H.A. Rehder, 1939. Mollusks collected on the Presidential Cruise of 1938. Smithsonian Miscellaneous Collections 98(10) [Publication 3535]: 18 pp. + 5 pls.
Cernohorsky, W. O. and T. Bratcher, 1987. Living Terebras of the world A monograph of the living Terebridae of the world. American Malacologists, Melbourne, FL. pp. 1-240.
Reid, D. G., 1989. Systematic revision of the Recent species of Peasiella Nevill, 1885 (Gastropoda: Littorinidae), with notes on the fossil species. The Nautilus 103(2): 43-69 Sept. 29.
Kaiser, K. L. 1997. The recent molluscan marine fauna of the Islas Galápagos. Festivus 29 Supplement. pp. 1-67.
Keen, A. M., 1971. Sea shells of tropical west America. Stanford Univ. Press, CA, pp. 1-1064 incl. numerous figs. + 22 pls.

Scanning Electron Micrograph

Near Florida Caverns State Park, Marianna, Jackson Co., Florida. Scanning Electron Micrograph by Dr. Wayne Van Devender of the Department of Biology, Appalachian State University, Boone, North Carolina.