I am an associate professor in life sciences at Arizona State University. My thesis was on the systematics and phylogeny of the genus Uca. I also run the website http://www.fiddlercrab.info
I feel I could curate the entire family Ocypodidae (at ~100 species Uca is easily the largest genus in the family and probably contains more than half the species of the family as a whole), but I'm happy to curate either just the genus Uca or the family Ocypodidae as a whole, whichever you feel is more appropriate.
Rosenberg, M.S. (2001) The systematics and taxonomy of fiddler crabs: A phylogeny of the genus Uca. Journal of Crustacean Biology 21(3):839-869.
Rosenberg, M.S. (2000) The Comparative Claw Morphology, Phylogeny, and Behavior of Fiddler Crabs (Genus Uca). Ph.D. Thesis. Department of Ecology and Evolution, State University of New York at Stony Brook, Stony Brook, NY.