Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae)

Perkins, Philip D. (2022): Thirty-three new species of water beetles in the genus Hydraena Kugelann from Cameroon (Coleoptera: Hydraenidae). Zootaxa 5203 (1): 1-66, DOI: https://doi.org/10.11646/zootaxa.5203.1.1, URL: http://dx.doi.org/10.11646/zootaxa.5203.1.