Nigrobaetis borneus sp. nov., larva morphology a labrum, ventral focus b labrum, dorsal focus (arrow: submedian seta) c labrum, dorsal focus (arrows: submarginal setae) d right mandible e left mandible f left mandible, margin between prostheca and mola. Scale bars: 20 µm.

 
 
  Part of: Kaltenbach T, Gattolliat J-L (2023) New species of Nigrobaetis from Southeast Asia (Ephemeroptera, Baetidae). ZooKeys 1166: 175-234. https://doi.org/10.3897/zookeys.1166.102941