From what Tim says I should expect this one in Ecuador. Don't have ID yet on the ones I DID find.
Tim Loh
09-Apr-2011 05:46
Have a species name for you! This is Stenhelmoides rufulus (Hinton), a widespread species in Central America south to Peru. Keyed from Spangler & Perkins (1989)- "A Revision of the Neotropical Aquatic Beetle Genus Stenhelmoides (Coleoptera: Elmidae)".
Tim Loh
09-Apr-2011 05:25
Stenhelmoides sp. Widespread in the Neotropical region.