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Bilton, D.T. 2023.

Two new species of Hydraena Kugelann, 1794 from São Tomé Island—an apparent adaptive radiation (Coleoptera, Hydraenidae)

. Zootaxa. 5254, 4 (Mar. 2023), 593–600. DOI:https://doi.org/10.11646/zootaxa.5254.4.11.