Buenoa deplanatylus 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 : 104-106

Buenoa deplanatylus Barbosa & Nessimian sp. nov.

Fig. 7–12

Type material. BRASIL, Estado de Rondônia, Município de Ariquemes, Rio Formoso (tributário do Rio Jaciparaná), igarapé (15:05) [10.388ºS / 64.617ºW], 14.VIII.1985, (V. Py-Daniel & L.S. Aquino): 1 m (INPA), macropterous, holotype. Paratypes: igarapé (11:34), 16.VIII.1985 (V. Py-Daniel): 1 m macropterous (INPA); Rio Candeias (tributário do Rio Jamari), Igarapé Pé da Serra [10.611ºS / 63.728ºW], 04.VIII.1985: 4 m and 2 f macropterous (DZRJ); 03–04.VIII.1985: 3 m macropterous (INPA).

6. According to Moreira et al. (2011), Truxal (1953) associated Ireng River with Amazonas, but this river forms part of the border between Brazil and Guyana in the northeast portion of Roraima.

7. Cited as “Amazonas – Belterra” (Nieser 1970). The municipality of Belterra belongs to the State of Pará.

Holotype (macropterous male). Measurements. Body length: 5.05; vertex: 0.16; synthlipsis: 0.06; head length: 0.38; head width: 1.26; pronotum length: 0.56; pronotum width: 1.44; scutellum length: 0.90; scutellum width: 1.24; length of fore femur: 0.70; width of fore femur: 0.21.

Color: General setae light brown. Setae on ventral surface of abdomen dark brown. Head yellow. Pronotum hyaline, yellow. Scutellum, metanotum, and abdominal terga yellowish stained with brown. Hemelytra brown at base of corium, at base of costal margin and final third of clavum; membrane hyaline. Ventral surface (except abdomen) and legs yellow. Metacoxa and ventral surface of abdomen brown.

Head. Greatest width of head about 7.8 times anterior width of vertex and distinctly narrower than greatest width of pronotum; head length on longitudinal median line about seven-tenths of length of pronotum. Synthlipsis narrow, three-eighths of vertex width. Frons wide with divergent margins. Tylus conspicuously flat and pubescent. Rostral prong shorter than third rostral segment, with base originating laterally on proximal region of this segment and apex rounded ( Fig. 7 ).

Thorax. Pronotum not impressed with posterior margin straight; longitudinal median length about four-tenths of its greatest width. Scutellum larger than longer; longer than median length of pronotum. Fore legs robust. External margin of fore femur straight near the base, without stridulatory area at inner surface; narrowed at apex, its length more than three times its width. Fore tibia with 22 stridulatory teeth, thicker at base; apex of internal margin bluntly projected ( Fig. 8 ). Mid-tibia enlarged at median region of external margin ( Fig. 10 ). Hind femur sinuous with 22 spines on inner surface; external margin with two spines apart along length and three spines near apex; internal margin without a line of crests, with 20 setae ( Fig. 11 ).

Abdomen. Hook of left clasper short with apex rounded. Right clasper reniform, with apex straight ( Fig. 12 ).

Paratypes (macropterous male and female). Measurements (male/female). Body length: 5.04–5.40/ 5.50; vertex: 0.16/ 0.15; synthlipsis: 0.05–0.06/ 0.06; head length: 0.41–0.47/ 0.43; head width: 1.23/ 1.26; pronotum length: 0.56–0.60/ 0.62; pronotum width: 1.41–1.45/ 1.44; scutellum length: 0.85–1.00/ 1.05; scutellum width: 1.17–1.25/ 1.22; length of fore femur: 0.65–0.71; width of fore femur: 0.21–0.23.

Color and structural characteristics similar to holotype. Male paratypes with greatest width of head about 7.6 times anterior width of vertex. Hind femur with 18 to 24 spines on inner surface and 20 to 23 setae on internal margin. Female paratype with greatest width of head 8.4 times vertex width; tylus not flat, slightly rounded. Lateral expansion at mid-tibia not so conspicuous. Hind femur slightly sinuous, with same male distribution pattern of spines on external margin, with 20 spines on inner surface and 22 setae on internal margin.

Etymology. The species epithet, deplanat, refers to the flattened tylus in males.

Comments. This species is very similar to B. tibialis Truxal , which was recorded only in the State of Goiás. Because of the similarity of the specimens from Rondônia and from Pará, it was difficult to recognize what specimen was indeed B. tibialis . The observation of B. tibialis paratypes in MNRJ showed that the specimens of Pará belong, in fact, to B. tibialis , and the specimens of Rondônia belong to a new species.

Buenoa tibialis is easily recognized by its larger size (males with 6.30 to 7.20), with its fore-femur bluntly projected at its apex ( Fig. 51 ), the mid-tibia enlarged a itst median region of the external margin, and the sinuous hind femur with a line of small spines on its inner surface. These features are observed also in B. deplanatylus . But B. deplanatylus is distinctly shorter (males with 5.05 to 5.40), with a lighter color pattern, conspicuous flat and pubescent tylus ( Fig. 7 ), and the right clasper straight apically (but rounded in B. tibialis ) ( Fig. 12 ).

Figures

FIGURES 1 – 12. 1 – 4. Buenoa sp. 1, Ventral view of head with frons narrow; 2, Ventral view of head with frons wide; 3, Lateral view of rostrum with measures used; 4, Ventral view of male fore femur with measures used. flt, femur length; fwd, femur width; lbm, labrum; rpl, rostral prong length; tls, tylus; trl, third rostral segment length; trs, third rostral segment. 5 – 6. Buenoa communis Truxal. 5, Lateral view of male rostrum with rostral prong slightly longer than third rostral segment; 6, Ventral view of male fore leg with stridulatory area on fore femur and dissimilar stridulatory teeth on tibia. 7 – 12. Buenoa deplanatylus sp. nov. 7, Lateral view of male rostrum with rostral prong shorter than third rostral segment; 8, Ventral view of male fore leg without stridulatory area on femur, internal margin of tibia bluntly projected, and with dissimilar stridulatory teeth; 9, Dorsal view of fore tibia with apex bluntly projected; 10, external margin of mid-tibia with dilatation at median region; 11, Ventral view of hind femur sinuous with a line of short spines; 12, 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.