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Type: Article
Published: 2008-07-23
Page range: 45–52
Abstract views: 29
PDF downloaded: 3

Fontidessus Miller and Spangler, a new genus of Bidessini from Venezuela (Coleoptera: Dytiscidae: Hydroporinae) with three new species

Department of Biology and Museum of Southwestern Biology, University of New Mexico, MSC03 2020, Albuquerque, NM 87131
Department of Entomology, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20560 USA
Coleoptera diving beetles classification taxonomy new genus new species Venezuela


A new genus, Fontidessus n. gen., and three new species F. toboganensis n. sp., F. ornatus n. sp., and F. wheeleri n. sp., are described from Venezuela. The new genus is similar to Uvarus and Bidessodes but is distinguished from all other Bidessini (including these) by a combination of the following: 1) transverse occipital line absent, 2) basal pronotal striae present, 3) basal elytral stria absent, 4) elytral sutural stria faintly present in some specimens, 5) anterior clypeal margin unmodified, 6) elytron without longitudinal carinae, 7) epipleuron without transverse carina at humeral angle, 8) lateral lobes of aedeagus two-segmented, 9) habitus elongate, oval, with lateral pronotal and elytral margins nearly continuously and shallowly curved, and 10) metatrochanter extremely large relative to metafemur, approximately 0.6 × length of metafemur.


  1. Biström, O. (1988) Generic review of the Bidessini (Coleoptera, Dytiscidae). Acta Zoologica Fennica, 184, 1–41.

    Miller, K.B. (2001) On the phylogeny of the Dytiscidae (Coleoptera) with emphasis on the morphology of the female reproductive tract. Insect Systematics and Evolution, 32, 45–92.

    Miller, K.B., Wolfe, G.W. & Biström, O. (2006) Phylogeny of the Hydroporinae and classification of the genus Peschetius Guignot, 1942 (Coleoptera: Dytiscidae). Insect Systematics and Evolution, 37, 257–279.

    Ribera, I., Vogler, A.P. & Balke, M. (2008) Phylogeny and diversification of diving beetles (Coleoptera: Dytiscidae). Cladistics, in press (doi: 10.1111/j.1096-0031.2007.00192.x).

    Young, F.N. (1967) A key to the genera of American bidessine water beetles, with descriptions of three new genera (Coleoptera: Dytiscidae, Hydroporinae). The Coleopterists Bulletin, 21, 75–84.

    Young, F.N. (1969) A checklist of the American Bidessini (Coleoptera: Dytiscidae-Hydroporinae). Smithsonian Contributions to Zoology, 33, 1–5.