Coloration (banding pattern and shade of yellow) characteristic of female B. pensylvanicus (A) and B. sonorus (B) Diagram (top) modified from image provided by Texas Parks & Wildlife.

 
 
  Part of: Beckham JL, Johnson JA, Pfau RS (2024) Molecular data support Bombus sonorus and Bombus pensylvanicus (Hymenoptera, Apidae) as distinct species. Journal of Hymenoptera Research 97: 895-914. https://doi.org/10.3897/jhr.97.132937