Massalongia nakamuratetsui sp. nov. 1 leaf galls (red arrows) on B. grossa 2 overwintering larva in cocoon on leaf litter 3 bottle-shaped cocoon.

 
 
  Part of: Elsayed AK, Skuhravá M, Ohta K, Yoshida S, Tokuda M (2020) Revision of the birch-associated genus Massalongia (Diptera, Cecidomyiidae), with description of a new species from Japan and a taxonomic key to worldwide species. ZooKeys 958: 1-27. https://doi.org/10.3897/zookeys.958.54300