Perkins, P.D. 2023. New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae). Zootaxa. 5367, 1 (Nov. 2023), 1–86. DOI:https://doi.org/10.11646/zootaxa.5367.1.1.