> Floridobia sp.
    (Cincinnatia sp.)

> Habitat & Distribution
This species is known only from Lake Waccamaw, Columbus County, North Carolina, and its tributary Big Creek (SCFTM 1990). Porter (1985) reported an average density of 273 per square meter in the lake, reaching maximum abundance in shallow, sandy regions with emergent vegetation.

> Ecology & Life history
No specific life history data are as yet available for the Lake Waccamaw Floridobia. Hydrobiids are dioecious, laying round or oval eggs singly on stones or vegetation (Clarke 1981, Dillon 2000, Brown 2001).

> Taxonomy & Systematics
The Waccamaw Floridobia has for quite a few years been referred to as "Cincinnatia sp."  It belongs to the hydrobiid subfamily Nymphophilinae, males being characterized by a lobe-shaped penis (or verge) with surficial glandular patterns (Kabat and Hershler 1993).  Floridobia is distinguished by crescent-shaped terminal and ventral glands on a large terminal penial lobe and a slender flagellum (Thompson & Hershler 2002).  The Waccamaw species has yet to be provided a formal name, although Thompson (pers. comm) indicates that a description is forthcoming in a monograph currently in preparation.

> Map of Floridobia distribution:
Click the small map to enlarge it or download the PDF.



North Carolina (PDF)



> References
Clarke, A.H. (1981) The Freshwater Molluscs of Canada. National Museum of Natural Sciences, National Museums of Canada, Ottawa, Canada. Brown, K.M. (2001)  Mollusca: Gastropoda. In: J.H. Thorp and A.P. Covich, eds., Ecology and Classification of North American Freshwater Invertebrates, Academic Press, New York. Pp. 297-329. Dillon, R.T., Jr. (2000) The Ecology of Freshwater Molluscs. Cambridge University Press, Cambridge, United Kingdom. Kabat, A.R., and R. Hershler (1993) The prosobranch snail family Hydrobiidae (Gastropoda: Rissooidea): review of classification and supraspecific taxa. Smithsonian Contributions to Zoology 547:1-94.  Porter, H. J. (1985) Molluscan census and ecological interrelationships. Rare and endangered fauna of Lake Waccamaw, North Carolina watershed system. NC Endangered Species Restoration Final Report, 1978-1981. NCWRC report. Scientific Council on Freshwater and Terrestrial Mollusks. (1990) (W. F. Adams, Chair) A report on the conservation status of North Carolina's freshwater and terrestrial molluscan fauna.  Thompson, F. G. & R. Hershler (2002)  Two genera of North American freshwater snails: Marstonia Baker, 1926, resurrected to generic status, and Floridobia, new genus (Prosobranchia: Hydrobiidae: Nymphophilinae).  The Veliger 45: 269 - 271.