Denticulobasis and Tuberculobasis, new genera close to Leptobasis, with description of ten new species (Odonata: Coenagrionidae). Author Machado, Angelo B. M. text Zootaxa 2009 2108 1 36 journal article 10.5281/zenodo.187806 9a495f32-3eb8-4b35-bd46-adca3b5db2d2 1175-5326 187806 Tuberculobasis arara sp.nov. Figures 25–26 , 57–59 Etymology: The name refers to the Arara indian people who inhabit the municipality of Ji-Paraná. Type specimen: Holotype (3), BRAZIL , Rondônia State, Ji-Paraná ( 8º03´N , 62º52´W ), 25-I-1961 , Machado & Pereira leg. (inside forest, away from water) ( ABMM ). Description. Male holotype . Head. Missing. Thorax. Prothorax: Anterior lobe grey, median lobe brown with brown-yellowish lateral areas. Posterior lobe reddish brown. Pterothorax: mesopleuron and metepisternum ventrally brownish yellow, dorsally brown with a poorly defined antehumeral grey stripe and a well defined metepisternal stripe continuing on to mesinfrepisternum. Legs yellow, wings hyaline, venation brown, pterostigma reddish brown. Px in FW 11–12 in HW 10; R 3 in FW originating near Px 6, in HW near Px 4–5. Petiolation distal to Ac by a distance twice or 1.5 times the length of Ac in FW and 1.5 times in HW. Abdomen. S1–2 dorsally brown, laterally whitish blue. S3–6 dorso-laterally dark brown with a pre-apical lateral yellow marking scarcely visible. S7–10 and cercus yellowish orange. Paraproct brown. Structural characters . Hind prothoracic lobe ( Figs 25, 26 ) without lateral lobes, median lobe subrectangular, dorsal lip fused medially with ventral lip resulting a median depression ( Fig. 25 ). Mesepisternal tubercles ( Figs 25, 26 ) high (2.36 mm) and divergent in dorsal view ( Fig. 25 ) with the apex subtruncated ( Fig. 25 ). Cercus ( Figs. 57–59 ) shorter than S10, about 1/3 shorter than paraprocts, with short ventro-medial subtriangular process ( Figs 58–59 ). Penis typical for Tuberculobasis (as in Fig. 89 ). Dimensions (mm). Abdomen 31.2; HW 19.2 Remarks. By having high metepisternal tubercles with their bases adjacent to mid-dorsal carina, paraproct much longer than cercus, and no lateral lobes in hind prothoracic lobe, T. arara belongs in the costalimai species group together with T. guarani , T. inversa , T. costalimai , and T. williamsoni . It is closer to