Habitat of Chasmogenus spp in Guyana. A Type locality and habitat for C. berbicensis, Guyana, margin/detrital sandbar of the upper Berbice River (collecting event GY14-0922-02A) B type locality and habitat for C. undulatus Guyana, near Ayanganna airstrip (collecting event GY14-0317-01A) C habitat for C. acuminatus and C. guianensis, Guyana, small tributary of the upper Berbice River (collecting event GY14-0924-01A) D habitat for C. acuminatus (collecting event GY13-1103-02A).

 
 
  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