Department of Entomology, Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138 USA. .
Zootaxa. 2022 Nov 3;5203(1):1-66. doi: 10.11646/zootaxa.5203.1.1.
Thirty-three new species of Cameroonian water beetles in the genus Hydraena Kugelann are described, based on the examination and databasing of 355 specimens from 19 localities/events. Male genitalia are illustrated, and high resolution habitus images of the holotypes are provided, as are distribution maps. The following new species of Hydraena are described: H. cameroancylis, H. cameroarida, H. camerobuloba, H. camerocameola, H. camerocarinata, H. cameroclandestina, H. camerocompacta, H. camerocomplexa, H. camerocompressa, H. cameroconcava, H. cameroconfinis, H. camerocontinua, H. camerocontrasta, H. cameroconvexa, H. camerocordata, H. camerocorona, H. camerocrebrata, H. camerocubita, H. camerocurvata, H. camerodidacta, H. camerodigita, H. cameroflagellata, H. camerofoveata, H. camerojocula, H. camerolatula, H. cameroovala, H. cameropalmula, H. cameropetila, H. cameroradiata, H. camerosemicordata, H. camerosetosa, H. camerosicula, and H. millenaria.
描述了来自 19 个地点/事件的 355 个标本，基于对 33 个喀麦隆水甲虫属 Hydraena Kugelann 的新种的检查和数据库建立。展示了雄性生殖器，并提供了模式标本的高分辨率生境图像和分布图。描述了以下 Hydraena 的新种：H. cameroancylis、H. cameroarida、H. camerobuloba、H. camerocameola、H. camerocarinata、H. cameroclandestina、H. camerocompacta、H. camerocomplexa、H. camerocompressa、H. cameroconcava、H. camerocontinua、H. camerocontrasta、H. cameroconvexa、H. camerocordata、H. camerocorona、H. camerocrebrata、H. camerocubita、H. camerocurvata、H. camerodidacta、H. camerodigita、H. cameroflagellata、H. camerofoveata、H. camerojocula、H. camerolatula、H. cameroovala、H. cameropalmula、H. cameropetila、H. cameroradiata、H. camerosemicordata、H. camerosetosa、H. camerosicula 和 H. millenaria。
