Dorsal view of heads of Chasmogenus spp. A C. castaneus B C. australis C C. bariorum D C. cuspifer E C. flavomarginatus F C. lineatus.

 
 
  Part of: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359