Systematics of the mayfly taxon Acentrella (Ephemeroptera: Baetidae), with description of new Asian and African species

Abstract

includes 2 species inexpectatum [Pseudocloeon] and gnom [Pseudocloeon]; their larvae, subimagoes, imagoes and eggs are described. Group sibiricum includes 3 species sibiricum [Pseudocloeon], diptera sp.n. [Acentrella] (new species from Siberia and Russian Far East) and scabriventris sp.n. [Acentrella] (new species from Kyrgyzstan and Tajikistan); their larvae, subimagoes, imagoes and eggs are described. African and Oriental representatives of Acentrella/fg1 constitute a holophyletic taxon Jubabaetis/g1 characterized by an autapomorphy in structure of left mola. Jubabaetis/g1 is divided to African taxon Tanzaniops/g(1) and Oriental taxon Jubabaetis/g2. A new species lunamontana sp.n. [Acentrella (Tanzaniops)] is described as larvae, subimagoes and imagoes from Uganda. Holophyletic taxon Jubabaetis/g2 is divided into a plesiomorphon Liebebiella/g(1) and holophyletic taxa Jubabaetis/g3 and Platybaetis/g(1). Three species of Liebebiella/g(1) are described as larvae, subimagoes and imagoes: verum [Pseudocloeon] (= deigma [Liebebiella], syn.n.), bispinosa sp.n. [Acentrella (Liebebiella)] and cylindroculata sp.n. [Acentrella (Liebebiella)] (new species from Sulawesi). Two species of Platybaetis/g(1) from Sulawesi are described as larvae, subimagoes and imagoes: mamasae sp.n. [Platybaetis] and wallacei [Platybaetis].