This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
Wbranch on Jan 7, 2010January 7th, 2010, 1:21 am EST
I was wondering if anyone knows where the banner picture is? It looks like the Power Lines section at the beginning of the No-Kill water on the Willowemoc. Hard to say for sure though.