Macunahyphes: A New Genus for Tricorythodes australis (Ephemeroptera: Leptohyphidae)

Abstract

Macunahyphes, gen. nov. is proposed to include Tricorythodes australis (Banks). In the present paper, the new taxon is described an illustrated from imagos and nymphs. The unique characters present in Macunahyphes gen. nov. are: in the male imago, (1) forceps tri-segmented with first segment distomedially projected, (2) penis with very wide base, becoming thinner toward a subapical constriction, and then slightly widening again, penis lobes of each side almost completely fused except apical insicion, (3) penes with a ventral projection covered with spines, and in the nymph, (4) glossae and paraglossae almost completely fused, with a circular outline, and (5) femora with numerous robust serrate setae.