Philibaetis gen. nov., a new genus from the Philippines (Ephemeroptera, Baetidae)

Investigations of type material and new from the Philippines (Luzon) revealed that Baetis luzonensis Müller-Liebenau, 1982 B. realonae do not belong to Leach, 1815. A genus, Philibaetis gen. nov. , is described accommodate both species are re-described based on larvae. The genus characterised by having a rectangular labrum with submarginal row long, simple setae dorsal surface ventrally lateral margins simple, spine-like setae, anterolateral feathered medially bifid partial, lanceolate setae. Both mandibles have blade-like incisors dorsally, mediolateral patch setae; additionally, left mandible has tuft partly branched at base subtriangular process. further hypopharynx medial stout anterolaterally, two smaller tufts galea-lacinia distal denti-seta tooth-like directed against canines, fore femur apically anterior posterior side without femoral claw one denticles or three subapical protogonostyli under cuticle male last instar larvae folded in Labiobaetis type, excluding their affiliation . COI sequences were obtained species. genetic distance (Kimura 2-parameter) between them 17.5% average. Very limited distances 0% 3% (0.75% average) found specimens P. comb.