The genus Buenoa Kirkaldy, 1904 (Hemiptera: Heteroptera: Nepomorpha: Notonectidae) in northern Brazil: inventory, new records, and new species Author Barbosa, Julianna Freires Author Nessimian, Jorge Luiz text Zootaxa 2013 3694 2 101 130 journal article 10.11646/zootaxa.3694.2.1 f2ab499e-7b71-4925-8e24-dfdfd8ca200e 1175-5326 221160 59BBA3B4-C46F-4B0F-B94D-AA03A11C1D05 Buenoa exilidens Barbosa, Nessimian, Ferreira-Keppler Fig. 18–20 Buenoa exilidens Barbosa, Nessimian, Ferreira-Keppler, 2010a: 52 [ Type locality: Brazil , State of Amazonas, Barcelos Municipality, Serra do Aracá, base, Igarapé da Anta; Types in Instituto Nacional de Pesquisas da Amazônia ( Brazil )]. Comments. Buenoa exilidens is similar, in general appearance, to B. platycnemis (Fieber, 1851) with its dark brown color and rostral prong originating laterally on the distal region of the third rostral segment, and distinctly longer than this segment. According to Barbosa et al. (2010a), B. exilidens differs from the first species by its rostral prong being thinner ( Fig. 18 , 43 ); the pronotum not tricarinate; the apex of the fore femur a little narrower ( Fig. 19 , 44 ); the stridulatory area with four to seven irregular ridges; and the claspers distinct ( Fig. 20 , 45 ). The pronotum of Buenoa platycnemis is distinctly tricarinate, and the stridulatory area has 11 to 14 well-marked ridges. The rostral prong of B. exilidens is similar to that of B. tumaquensis Padilla-Gil, 2010 , a species that occurs in Colombia . Buenoa exilidens , however, lacks the parallel striae perpendicular to the stridulatory comb of the fore femur, with fewer ridges, and less teeth on the stridulatory comb of the fore tibia than in B. tumaquensis . Material. BRAZIL : Estado do Amazonas, Município de Barcelos, Serra do Aracá, base, Igarapé da Anta, alt. 152 m [ 00.87913ºN / 63.45395ºW ], poça em rocha (laje), 03.VIII.2009 (U. G. Neiss): 1 m macropterous, holotype (INPA). Paratype : idem holotype , 1m macropterous (INPA).