Two specimens of B. elongatulus demonstrating adult size variation within the species. Scale bar: 5 mm.

 
 
  Part of: Ikagawa RM, Moore W (2022) ´╗┐Molecular phylogeny and revision of species groups of Nearctic bombardier beetles (Carabidae, Brachininae, Brachinus ( Neobrachinus)). ZooKeys 1131: 155-171. https://doi.org/10.3897/zookeys.1131.85218