A new species of Choroterpes Eaton, 1881 (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) from Western Himalaya, India

Abstract

As part of an ongoing exploration of the mayflies of hill streams/rivers of Western Himalaya, we describe a new species, Choroperpes (Choroterpes) girigangaensis Kubendran and Vasanth sp. nov. It can be differentiated from all other known species of the genus by the following combination of characters: (i) femur with a dark brown macula middle and apex; (ii) anteromedian emargination of the labrum with five broad unequal denticles; (iii) hind tibiae with a row of the dense medium, long, feathered setae; (iv) upper and lower lamellae of gills II–VII broad, alike with 3 apical processes; and (v) tarsal claw apically hooked with a row of 13–14 denticles. Brief ecology of habitat information and larval key to the known Indian species of Choroterpes (Choroterpes) is also provided.