The latter genus includes a single species, Cincinnatia integra (Say, 1817). The other three forms, C. limum (Anthony, 1860), C. floridense Call,1866 and C. parthenum Vail, 1979, are exclusively apomictic parthenogens and have been separated on the basis of aperture coloration, embryonic shell coloration, and contour of the outer lip (Vail 1979a). Whorls straight-sided, not scalariform; suture hardly distinct; aperture terminating at periphery of last whorl; vertical ribs weaker and closely spaced; adult size about 25-30 mm long (Fig. Suture more deeply impressed. 115, 116). Bantam Hydrobe dalli Apex distinctly convex in outline. Aperture ovate; baso-columellar angle not extended; basal lip not indented. 44). 3:51. Body whorl relatively narrow, not conspicuously enlarging near aperture (Fig. Essentially identical shells occur repeatedly among unrelated genera and subfamilies. Spurwinkia: Morphology, systematics, and ecology of a new genus of North American marshland Hydrobiidae (Mollusca: Gastropoda). 180-182). Curator of Malacology. 101). 137, 139). Vas deferens independent of blind caecum and its duct. Shell small, about 3.0-3.5 mm long; adult with 4.4-4.8 whorl; lower corner of aperture tending to be angulate with fluted channel (Fig. Shell conical or cylindrical-conical in shape; spire elevated; body whorl not disproportionately voluminous; umbilicus closed or open. The following key includes all of the species that occur in Florida and some that occur in Alabama, Georgia, and South Carolina. (Thompson, 1968). Last few whorls in large adults scalariform. Campeloma geniculum (Conrad, 1834) is readily recognized by its obese, solid shell; it usually has a normal proportion of males in its populations, although some populations are apomictic parthenogens. Apical whorls bluntly rounded and not conspicuously elevated. Since then a great amount of fieldwork has taken place throughout Florida, and many additions to the fauna have come to light. (Pilsbry and Johnson, 1903). A review of the recent freshwater limpet snails of North America. 119). The family contains numerous genera and species, some of which are important medically as intermediate hosts for trematode parasites.

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