Review of the filter-feeding caddisfly subfamily Macronematinae (Trichoptera: Hydropsychidae) in tropical Southeast Asia

Abstract

A comprehensive taxonomic review of the tropical Southeast Asian Macronematinae (Trichoptera: Hydropsychidae), one of the major aquatic insect groups in the region, resulted in the recognition of 56 valid species belonging to seven genera. Species with observed materials were provided with diagnoses and additional descriptions, while 11 species with unavailable material were discussed in regard to their type information and taxonomic validity. Additional two species, Trichomacronema vietnamensis, new species, and an undetermined species, Macrostemum sp., were described. Genitalia illustrations and colour wing images were provided for each of the species examined, and figures of the heads and thoraces of selected species were also included. Figures of unavailable species were redrawn based on the original published figures. An identification key to the seven genera and all 56 valid species was provided.