Buenoa penta, Padilla-Gil, Dora N., 2012

Padilla-Gil, Dora N., 2012, Two new species of Buenoa (Hemiptera: Heteroptera: Notonectidae) from Colombia, with a key to the species in Colombia, Zootaxa 3316, pp. 50-56 : 50-53

Buenoa penta sp. n.

Type material. HOLOTYPE, 3, allotype Ƥ: COLOMBIA, Nariño, Tumaco, Finca Mar Agrícola, lake eight, Universidad de Nariño, 10 m, 17 November 2010, leg. D. Padilla, ( ICN). PARATYPES, same data as holotype, of these the following have been distributed: 8 3, 8 Ƥ ( ICN), 8 3, 8 Ƥ (PSO-CZ).

Macropterous form. Dimensions. Length 3 8.80, Ƥ 8.80; greatest body width 3 1.88; Ƥ 1.92. Brachypterous form, length 3 8.26, Ƥ 8.20; greatest body width 3 1.84; Ƥ 1.92. Width of head 3 1.52−1.56 and Ƥ 1.52.

Color. Body generally bright white with dark eyes. Abdominal venter black except orange keel and portions of connexivum; abdominal dorsum white with abdominal apex black in males and yellow in females.

Male structural characteristics: As viewed from above, outline of head rounded with anterior margin of vertex continuous with that of eyes. Vertex slightly indented. Width of head approximately six times anterior width of vertex (1.52/0.26), smaller than humeral width of pronotum. Synthlipsis two times anterior width of vertex (0.10/ 0.26). Head 2.4 times shorter than pronotum along midline. Tylus inflated, glabrous. Labrum wider than long, with scattered setae and pointed apex. Rostral prong ( Fig. 1a ) longer than third rostral segment, with base originating at distal end of third rostral segment, and with pointed apex. Pronotum tricarinate; lateral margins slightly divergent; posterior margin convex, medially concave; median length 1.5 times width (1.80/1.20). Scutellum and pronotum lengths at midline equal. Fore femur wide and slightly narrowed at apex; stridulatory area with 5 ridges ( Fig. 1 b); fore tibia with stridulatory comb consisting of approximately 28 teeth ( Fig. 1 c), with 11 long basal teeth, then another 10 (7 crescents and 3 decreasing teeth), followed by 7 semi-horizontal teeth. Approximately five short, peg-like setae visible on outer surface of tibia at apex ( Fig. 1 d), and at end of tibia a hook-shaped seta. Fore and middle legs have round, dark preapical structure in tarsus II ( Fig. 1 e). Male genital claspers ( Figs. 1f, 1 g). Spine from caudo-sinistral margin curved and very narrow in apical 2/3.

Female structural characteristics: Hind femur with 27 spines along posterior margin.

Etymology. Penta . A Greek noun meaning “five,” referring to the five short, peg-like setae on the outer surface of the tibia.

Ecological notes. Buenoa penta shares the habitat with Buenoa uselus Padilla-Gil , Microvelia longipes Uhler , and Microvelia pulchella Westwood. The habitat is characterized by air temperature 25 ºC, water temperature 26 ºC, pH 6, conductivity 1 S/m. Deep ≥ 1m, and with abundant vegetation around the lake, without floating vegetation.

Comparative notes. B. penta n. sp. is characterized by the width of the head, which is 1.52−1.56 and the synthlipsis (0.10). Also, the fore tibia has 5 short, peg-like setae on the outer surface of the tibia near the apex ( Fig. 1 d). The tibia ends in a hook-like shape and there is an irregular disposition of the teeth on the fore tibia.

Buenoa dactylis Padilla-Gil has 3−4 peg-like setae on outer lateral apex of the fore tibia, whereas B. penta has 5 peg-like setae with different position (compare Figs. 1 d, 1h). B. penta is similar to B. prosthetus Padilla-Gil in the shape of the comb of the fore tibia, but the latter is smaller (male L/W: 8.0/1.72), the synthlipsis is four times the anterior width of vertex (two times in B. penta ), and the shapes of the comb of the fore femur and male genital claspers are different.

Figures

FIGURES 1 a − 1 e. Buenoa penta sp. n., male. 1 a Rostrum in lateral view; 1 b Fore leg and comb; 1 c Tibial comb (400 X); 1 d Enlarged view of peg-like setae on outer surface of fore tibia; 1 e Preapical structure of fore tarsus II.