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Keywords:

  • Baetis sahoensis;
  • diagnosis;
  • new record;
  • Nigrobaetis tatuensis

Abstract

Baetis taiwanensis is recorded from Japan, and its imagoes and subimagoes are described for the first time. We provide diagnostic characters which are useful to distinguish B. taiwanensis from an allied species, Baetis sahoensis, in imago, subimago and nymph. We reveal that the line drawings of B. taiwanensis and Nigrobaetis tatuensis were inadvertently interchanged in the original description.