Denticulobasis and Tuberculobasis, new genera close to Leptobasis, with description of ten new species (Odonata: Coenagrionidae). Machado, Angelo B. M. Zootaxa 2009 2108 1 36 4396 [151,330,151,177] Insecta Coenagrionidae Denticulobasis Animalia Odonata 8 9 Arthropoda genus gen. nov.    Typespecies:  Denticulobasis garrisoni  sp. nov., by present designation.   Etymology:From the Latin denticulus– meaning diminutive of tooth and – basis, a Greek feminine noun for pedestal or foundation; a common suffix used in Coenagrionidae. The name  Denticulobasisis an allusion to the presence of a plate with denticles on female sternum S8.   Distribution: Braziland Peru( Fig. 101).  Generic characterization. Medium size damselflies (HW 18.2–19.2 mm). Top of head brown with blue postocular spots. Thorax dominantly yellow, with three longitudinal pale blue stripes: antehumeral, metepisternal, and metepimeral. S1–7 dorsally brown, laterally yellow, S8–10 dorso-laterally yellow. Frons rounded. Hindprothoracic lobe in males with very small lateral lobes, median lobe well-developed, projected caudally and two-lipped ( Figs 4–6); females with well-developed lateral and median lobes ( Figs 8–10), the latter single-lipped. Male mesepisternum with an antero-medial horn with a basal smooth portion and a distal portion ridged as a screw. Female mesepisternum with an antero-medial mammiliform tubercle. Metafemoral spines on distal 1/2 as long as width of femur ( Fig. 3a); metatibial spurs shorter than intervening spaces ( Fig. 3b). Supplementary tooth of tarsal claw well-developed ( Figs 3c, d). Wings petiolated distal to Ac for a distance as long as or twice as long as Ac length ( Fig. 3e). R 3 inFW and HW originating closer to Px 6 ( Fig. 3e). Penis ( Figs. 1) distal segment expanded laterally along distal 1/3 forming a large lateral terminal lobe and with two lateral lobes on each side. No terminal fold. Internal fold with a filiform process directed disto-laterally ( Fig. 1). Male cercus with a dorso-lateral membranous depression at base ( Figs. 12–13) and no ventral process. Cercus in lateral view subequal to S10 (excluding distal lobe). Female sternum S8 with a denticulated vulvar plate (Figs. 18, 20, 22). Ovipositor extending to about level of tip of cercus ( Fig. 11). Ventral border of lateral valve of ovipositor with one row of denticles each one subrectangular, directed ventro-posteriorly and associated with a robust short truncated seta ( Fig. 2a).