A new mayfly genus of the subfamily Caeninae (Ephemeroptera: Caenidae) from Sumatra and two new Caenis species from Papua New Guinea

Abstract

Abstract The new Caenidae genus Liebenauis (Type species L. tenuipes) is described from larval material collected in Sumatra and attributed to the subfamily Caeninae. It is closely related to the tribe Caenini and defined by long and very thin legs and modified, finger- or pine needle-shaped chloride cells on the ventral side of the operculate gill. Such types of chloride cells are not known in any other Caeninae. Two new species of Caenis from Papua New Guinea are also described.