Gonserellus atopus from Chile, a new genus and species, is described b
ased on the mature nymph. The nymph of Gonserellus is distinguished fr
om that of other leptophlebiid genera by having a well-developed galea
-lacinial tusk on the maxilla and prominent bipectinate spines on the
tibiae. Gonserellus appears to be a member of the Nousia lineage based
on a number of shared derived nymphal characters.