Buenoa dactylis Padilla-Gil, 2010, sp. n.
Creators: name: Padilla-Gil, Dora N.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Notonectidae
Buenoa
Buenoa dactylis

description: Buenoa dactylis sp. n.
Type material. HOLOTYPE, macr ♂, allotype macr ♀: COLOMBIA, Nariño, Tumaco, Finca Mar Agrícola, Universidad de Nariño, 0–3 m, 20 November 2008, leg. D. Padilla, (ICN). PARATYPES, same data as holotype, of these the following have been distributed: 5 brach ♂, 6 brach ♀, 3 macr ♀ (ICN), 5 brach ♀, 3 macr ♂, 5 macr ♀ (PSO-CZ), 3 brach ♂, 4 brach ♀ (CP).
Macropterous form. Dimensions. Length M 8.0, F 8.4; greatest body width M 1.64; F 1.76. Brachypterous form, length M 7.2, F 7.7; greatest body width M 1.64; F 1.88. Width of head M and F, 1.36–1.4.
Color. General body bright white dark eyes. Mesothorax with two anterolateral brown areas. Abdominal venter black except keel and portions of connexivum, these white; abdominal dorsum white with irregular areas of black and yellow apex. Along median longitudinal axis of head, pronotum, and hemelytra covered with thin, long, transparent setae. Membrane, however, not covered. Female differings from the male with yellowish connexivum and abdominal dorsum.
Male structural characteristics: As viewed from above, outline of head rounded with anterior margin of vertex continuous with that of eyes. Also, vertex slightly indented. Width of head approximately five times anterior width of vertex (1.38/0.24) and smaller than humeral width of pronotum; synthlipsis three times anterior width of vertex (0.08/0.24); along median longitudinal axis, head is 2.4 times shorter than that of pronotum; tylus inflated, and glabrous; the labrum’s width twice its length, displaying a tuft of hair, and a truncate apex; rostral prong (Fig. 3 a) longer than third rostral segment, with base originating at distal end of third rostral segment, and with truncate apex. Pronotum tricarinate; lateral margins slightly divergent; posterior margin convex, medially concave; median length 1.5 times its width (1.44/0.96). Scutellum short, pronotum with median length 1.2 time median length of scutellum. Fore femur wide and somewhat thickened at apex; stridulatory area with 3–4 weak ridges, with apical one irregular (Fig. 3 b); fore tibia with stridulatory comb consisting of approximately 27 teeth (Fig. 3 c), with 10–11 long basal teeth, then another 15 (7 crescents and 8 decreasing ones), followed by shorter teeth. At apex characteristic finger-shaped tooth stands out (Fig. 3 c). Approximately three short, peg-like setae visible on outer surface of tibia at apex (Fig. 3 d), and at end of tibia a hook-shape one. Tarsus II, of middle leg has row of ~14 longer setae perpendicular to apex. Fore and middle legs have round, dark preapical structure in tarsus II (Fig. 3 e). Male genital claspers normal. Spine from caudo-sinistral margin curved and very narrow in the 2/3 apical.
Female structural characteristics: female displays a yellow abdomen, and dark tergites IV and V. Also, hind femur has 22 spines along posterior margin.
Variation within species also occurs: In some of the specimens depigmentation occurs and the stridulatory area of the fore femur is not conspicuous. On the other hand there are slight variations regarding the margins of the pronotum that go from parallel to slightly divergent. Additionally, scutellum is sometimes smaller, changing the proportions in relation to the pronotum.
Etymology: Dactilo. A Greek noun meaning “finger,” referring to the basal tooth of the comb of the fore tibia, which is longer than the rest and is finger-shaped.
Comparative notes: B. dactylis is characterized by the width of the head, which is 1.36–1.4; the labrum is twice as wide as the synthlipsis is long (0.08). Also, the fore tibia has 3–4 short, peg-like setae on the outer surface of the tibia at the apex (Fig. 3 d). The tibia ends in a hook-like shape, and there is an irregular disposition of the teeth from the fore tibia.
Buenoa gracilis Truxal has 3–4 peg-like setae on the inner surface of the fore tibia at the apex, whereas B. dactylis has them in the outer lateral apex (Fig. 3 d).
description: Published as part of Padilla-Gil, Dora N., 2010, Five new species of Buenoa (Hemiptera: Heteroptera: Notonectidae) from Colombia, pp. 22-32 in Zootaxa 2411 on pages 24-27, DOI: 10.5281/zenodo.293945