Diagnostic characters of Pyrrhalta semifulva (Jacoby) A antenna, male B antenna, female C aedeagus, typical form, dorsal view D ditto, lateral view E aedeagus, variation (endophallic sclerites omitted), dorsal view apex of tibia of middle leg, male F ditto, lateral view G abdominal ventrite VIII H ermatheca I abdominal ventrite V, female J abdominal ventrite V, male K gonocoxae.

 
 
  Part of: Lee C-F, Bezděk J (2021) Revision of the genera Xanthogaleruca Laboissière, 1932 and Pyrrhalta Joannis, 1865 (Coleoptera, Chrysomelidae, Galerucinae) of Taiwan, with type designation of Galerucella lineatipes Takei. ZooKeys 1039: 1-108. https://doi.org/10.3897/zookeys.1039.64740