Buenoa dilaticrus Barbosa, Nessimian

Barbosa, Julianna Freires & Nessimian, Jorge Luiz, 2013, The genus Buenoa Kirkaldy, 1904 (Hemiptera: Heteroptera: Nepomorpha: Notonectidae) in northern Brazil: inventory, new records, and new species, Zootaxa 3694 (2), pp. 101-130 : 106-107

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).

Figures

FIGURES 13 – 26. 13 – 17. Buenoa dilaticrus Barbosa, Nessimian & Ferreira-Keppler. 13, Lateral view of male rostrum with rostral prong shorter than third rostral segment; 14, Ventral view of male fore leg without stridulatory area on femur and dissimilar stridulatory teeth on tibia; 15, Dorsal view of fore leg with internal margin of tibia bluntly projected; 16, Mid-tibia with lateral expansion near the base of lateral margin; 17, Claspers. Scale bar: 0.5 mm. 18 – 20. Buenoa exilidens Barbosa, Nessimian & Ferreira-Keppler. 18, Lateral view of male rostrum with rostral prong distinctly longer than third rostral segment; 19, Ventral view of male fore leg with stridulatory area on femur and similar stridulatory teeth on tibia; 20, Claspers. 21 – 22. Buenoa femoralis (Fieber). 21, Lateral view of male rostrum with rostral prong distinctly longer than third rostral segment; 22, Ventral view of male fore leg with stridulatory area on femur and similar stridulatory teeth on tibia. 23 – 26. Buenoa fuscipennis (Berg). 23, Lateral view of male rostrum with rostral prong distinctly shorter than third rostral segment; 24, Ventral view of male fore leg with a tubercle on trochanter, without stridulatory area on femur and similar stridulatory teeth on tibia; 25, Midtibia with internal margin dilated; 26, Claspers.

FIGURES 50 – 62. 50 – 52. Buenoa tibialis Truxal. 50, Lateral view of male rostrum with rostral prong shorter than third rostral segment. 51, Ventral view of male fore leg with stridulatory area on femur and slightly dissimilar teeth on tibia; 52, Claspers. 53 – 56. Buenoa truxali Nieser. 53, Lateral view of male rostrum with rostral prong as long about third rostral segment; 54, Ventral view of male fore leg with stridulatory area on femur, anterior margin of fore tibia acutely projected at apex and dissimilar teeth; 55, Detail of apex of fore tibia acutely projected; 56, Claspers. 57 – 59. Buenoa unguis Truxal. 57, Lateral view of male rostrum with rostral prong shorter than third rostral segment; 58, Ventral view of male fore leg without stridulatory area on femur, dissimilar teeth on tibia, and tarsus swollen with claws hooked; 59, Claspers. 60 – 62. Buenoa amnigenoidea Nieser. 60, Lateral view of male rostrum with rostral prong longer than third rostral segment; 61, Ventral view of male fore leg with a projection on trochanter, without stridulatory area on femur and dissimilar teeth on tibia; 62, Claspers.