A new species of Tenuibaetis Kang & Yang, 1994 from Indonesia (Ephemeroptera, Baetidae).

A new species of Tenuibaetis Kang & Yang is described and illustrated based on larvae collected in Java in 2010, which is the most southeastern report of this genus to date. The total number of Tenuibaetis species is thereby augmented to seven. The morphological differences of all other species are discussed and summarised in tabular form.