Guloptiloides: an extraordinary new carnivorous genus of Baetidae (Ephemeroptera)

Guloptiloides (Ephemeroptera, Baetidae), gen.n., is described to accomodate the species G. gargantua (larvae) and G. spA (female imagoes) based on spe cimens from the Eastern coast of Madagascar. Larvae of Guloptiloides are re markable by the adaptation of the mouthparts to a predatory diet. It is als o distinct from other genera in that adults have hindwings with 3 well-mark ed longitudinal veins and a single extremely developed spur on the costal m argin. Affinities and ecology are discussed.