> Littoridinops tenuipes (Couper 1844)
  

> Habitat & Distribution
This is an easily-overlooked inhabitant of an environment that can be difficult to sample.  Its type locality is the Altamaha River, 5 miles above the coastal town of Darien, Georgia, and Burch quoted Thompson's (1968) statement of the range as extending only south, through Georgia and east Florida.  But I have personally collected L. tenuipes in freshwater tidal and brackish regions of coastal rivers through the Carolinas to Virginia, and the US National Museum contains records as far north as Maine.  My samples have generally come from marshes, on emergent vegetation and floating debris.

> Ecology & Life history
I am unaware of any good study of the ecology of Littoridinops.   Data on the range of salinity tolerated would be especially welcome.  My limited collections have generally been made from waters that were, to judge by their vegetation and their taste, entirely fresh.  But L. tenuipes certainly does range into environments that are at least slightly brackish, from which I have very little data.

> Taxonomy & Systematics
Littoridinops is classified in the hydrobiid subfamily Hydrobiinae.  Its penis is fringed with numerous papillae, strikingly different from other hydrobiids of the American southeast.


> References
Smith, D. G.  (1987)  The genus Littoridinops (Mesogastropoda: Hydrobiidae) in New England.  Veliger 29: 442 - 444.  Thompson, F. G. (1968)  The Aquatic Snails of the Family Hydrobiidae of Peninsular Florida.  Gainesville: University of Florida Press.  268 pp.