PHILIP D. PERKINS (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): 1-86 https://www.mapress.com/zt/article/view/zootaxa.5367.1.1
