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Abstract
Zephlebia Penniket is redescribed and the status of subgenera previously recognised is assessed. The subgenus Neozephlebia Penniket is raised to generic rank. The only species of Neozephlebia recognised is N. scita (Walker). A new genus, Acanthophlebia, is established for Zephlebia (Zephlebia) cruentata (Hudson). Two subgenera of Zephlebia are recognised. A new subgenus, Terama, is established for Zephlebia borealis (Phillips), which is formally described for the first time. Five species are recognised in Zephlebia s.s.: versicolor (Eaton); dentata (Eaton); inconspicua n.sp.; spectabilis n.sp.; and planulata n.sp. All 3 genera are endemic to New Zealand. The relationships of each genus and the biology of each species are discussed. Life stages are described for all species except Z. planulata, of which the nymph is unknown. A key to imagos and nymphs of the species of Zephlebia is provided, and a possible phylogeny of the genus is discussed. A key is given to male and female imagos and nymphs of all New Zealand genera in the Zephlebia lineage, and to all genera with species previously placed in Zephlebia.
