DYTISCIDAE Author: John F. Lawrence, 2001. Classification Suborder Adephaga Description Antenae with 11 segments, filiform. Antennal insertions concealed. Visible portion of procoxa globular with the trochantin concealed. Procoxal cavity externally open and internally closed. Mesocoxae contigous to separated by 1 coxal width, with mesocoxal cavity laterally open. Tarsal formula 5-5-5. Numberof ventrites 6 with 3 connate. Body length 1-30 mm. Elliptical, boat-shaped. Metacoxae very large, plates absent. Quick identification Dytiscidae is the major aquatic adephagan group with a suite of swimming adaptations in the adult, including the streamlined form, very large hind coxae which lack the distinct plates present in Noteridae, and strong hind legs with swimming hairs. Genera occurring in Costa Rica Hydroporinae: Anodocheilus, Bidessodes, Bidessonotus, Brachyvatus, Celina, Desmopachria, Derovatellus, Hydrovatus, Liodessus, Macrovatellus, Neobidessus, Neoclypeodytes, Pachydrus, Queda, Stictotarsus, Uvarus. Laccophilinae: Laccodytes, Laccophilus. Copelatinae: Agaporomorphus, Copelatus. Colymbetinae: Agametrus, Platynectes, Rhantus. Dytiscinae: Cybister, Eretes, Hydaticus, Megadytes, Thermonectus. © CSIRO Emtomology, 1999 © CSIRO Emtomology, 1999 © CSIRO Emtomology, 1999 © CSIRO Emtomology, 1999 © CSIRO Emtomology, 1999 Derechos Reservados INBio. Copyrights INBio