I've seen Keroplatus militaris, K. clausus and K. carbonarius in person. This is not K. carbornarius because the antennae of that species are distinctive in their apical banding. K. clausus has much shorter claspers; likewise to K. terminalis which is a western species (seen in a photograph here: http://keroplatidae.wikispot.org/Keroplatus_terminalis). Fisher could not distinguish between the genetalia of the two, but Loic Matile (1990) provided more than adequate illustrations.

This is probably K. militaris (if not an undescribed species), since the claspers are distinctive for being long and pointed. This is clear in both Elizabeth Fisher's 1941 illustrations and in Matile's book on Keroplatidae. Great photos btw!