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Published: 2017-03-02

Two new terrestrial species of Hydraena Kugelann from the island of Bioko, Gulf of Guinea (Coleoptera: Hydraenidae)

P.O. box 118, 08911 Badalona, Catalonia, Spain.
Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Passeig Maritim de la Barceloneta 37-49, 08003 Barcelona, Spain.
Coleoptera Hydraenidae


The knowledge of the Hydraenidae of sub-Saharan Africa, and in particular of the genus Hydraena Kugelann, 1794, is most incomplete. As an example, in southern Africa only three species were described before the revision of Perkins (2014), which raised the number to 31. Only 15 species are currently known from Central Africa, between the Sahel and South Africa, all belonging to subgenus Hydraenopsis Janssens, 1972 (Trizzino et al. 2013), but many more remain to be described and discovered. The islands of the Gulf of Guinea are no exception to this lack of knowledge (Jones 1994), and only one species of the family was previously known, H. (Hydraenopsis) pagaluensis Hernando & Ribera, 2001 from Annobón (Hernando & Ribera 2001; Trizzino et al. 2013). In this paper we describe the first known species of Hydraenidae from Bioko, the largest and closest to the continent of these islands. The species were collected by our friend and colleague Vasily Grebennikov during a survey of the forest litter fauna of Annobón and Bioko. Despite considerable efforts no Hydraenidae were found in Annobón, and only these two species, in a single locality, in Bioko.



  1. Folmer, O., Black, M., Hoeh, W., Lutz, R. & Vrijenhoek, R. (1994) DNA primers for amplification of mitochondrial cytochrome oxidase subunit I from diverse metazoan invertebrates. Molecular Marine Biology and Biotechnology, 3, 294–299.

    Grebennikov, V.V. (2014) DNA barcode and phylogeography of six new high altitude wingless Niphadomimus (Coleoptera: Curculionidae: Molytinae) from Southwest China. Zootaxa, 3838 (2), 151–173.

    Hernando, C. & Ribera, I. (2001) Hydraena (Hydraenopsis) pagaluensis n.sp., the first known hydraenid from Pagalu island, Gulf of Guinea (Coleoptera, Hydraenidae). Entomologische Blätter, 97, 9–12.

    Jäch, M.A. & Balke, M. (2008) Global diversity of water beetles (Coleoptera) in freshwater. Hydrobiologia, 595, 419–442.

    Jones, P.J. (1994) Biodiversity in the Gulf of Guinea: an overview. Biodiversity and Conservation, 3, 772–784.

    Millán, A. & Aguilera, P. (2000) A new species of Hydraena Kugelann from the spring of Fuenfría (Segura Basin, SE Spain), a site of special conservation interest (Coleoptera: Hydraenidae). Koleopterologische Rundschau, 70, 61–64.

    Perkins, P.D. (2014) A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae). Zootaxa, 3758 (1), 1–92.

    Simon, C., Frati, F., Beckenbach, A., Crespi, B., Liu, H. & Flook, P. (1994) Evolution, weighting, and phylogenetic utility of mitochondrial gene-sequences and a compilation of conserved polymerase chain-reaction primers. Annals of the Entomological Society of America, 87, 651–701.

    Trizzino, M., Jäch, M.A., Audisio, P., Alonso, R. & Ribera, I. (2013) A molecular phylogeny of the cosmopolitan hyperdiverse genus Hydraena Kugelann (Coleoptera, Hydraenidae). Systematic Entomology, 38, 192–208.

How to Cite

HERNANDO, C., & RIBERA, I. (2017). Two new terrestrial species of <em>Hydraena</em> Kugelann from the island of Bioko, Gulf of Guinea (Coleoptera: Hydraenidae). Zootaxa, 4238(2), 281–286.