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 dilaticrus Barbosa, Nessimian , Ferreira- Keppler Fig. 13–17 Buenoa dilaticrus Barbosa, Nessimian, Ferreira-Keppler, 2010a: 50 [ Type localities: Brazil , State of Amazonas, Barcelos Municipality, Serra do Aracá, igarapé da Anta; Serra do Aracá, igarapé; State of Roraima, Alto Alegre, Serra de Surucucus, Rio Talemu-u baixo; Types in Instituto Nacional de Pesquisas da Amazônia ( Brazil ) and Coleção Entomológica Professor José alfredo Pinheiro Dutra – Universidade Federal do Rio de Janeiro ( Brazil )]. Comments. Buenoa dilaticrus resembles B. tibialis Truxal, 1957 in general appearance, including the color pattern. According to Barbosa et al. (2010a), in both species the head and thorax are yellow, posterior region of hemelytra and abdomen dark brown; rostral prong originating laterally on proximal region, shorter than the third rostral segment and with its apex rounded; the fore femur lacking a stridulatory area; internal margin of fore tibia apically projected; and the hind femur sinuous. Buenoa dilaticrus can be distinguished by its tylus being strongly inflated and rounded ( Fig. 13 ); lateral expansion at the base of external margin of mid-tibia ( Fig. 16 ); hind femur with a line of crests on internal margin, each one with a short seta at apex; and left clasper with hook well developed apically (fig. 17). Buenoa tibialis possesses a tylus slightly inflated ( Fig. 50 ); mid-tibia enlarged at median region of external margin; hind femur sinuous with a line of short spines on inner surface; and left clasper with hook short and rounded apically ( Fig. 52 ). The expanded mid-tibia of B. dilaticrus is very similar to that of B. oreia Nieser, Melo, Pelli, De Campos Barbosa, 1997 , although the last species does not occur in the Amazon Region and is distinctly bigger, including its distinct rostral prong, among other features. Material. BRAZIL : Estado do Amazonas, Município de Barcelos, Serra do Aracá, igarapé da Anta, alt. 1116 m [ 00.90844ºN / 63.44009ºW ], 31.vii.2009 (N. Ferreira Jr.): 1 m macropterous, holotype (INPA). Paratypes : idem holotype , 1m and 1f macropteres (INPA), 1m and 1f macropteres (DZRJ). Serra do Aracá, igarapé, alt. 1110 m [ 00.90612ºN / 63.45923ºW ], 01.viii.2009 (N. Ferreira Jr.): 1 m macropterous (INPA). Estado de Roraima, Alto Alegre, Serra de Surucucus, Rio Talemu-u baixo, 01.xii.1991 (V. Py-Daniel & U. C. Barbosa): 1 m macropterous (INPA).