Ambracius rudybuenoi, Ferreira, Paulo Sérgio F. & Henry, Thomas J., 2010

Ferreira, Paulo Sérgio F. & Henry, Thomas J., 2010, Revision of the genus Ambracius Stål, 1860 (Heteroptera: Miridae: Deraeocorinae: Clivinematini), with descriptions of three new species, Zootaxa 2485, pp. 1-15 : 10-12

Ambracius rudybuenoi n. sp.

(Fig. 7)

Diagnosis: Pronotum, scutellum, and hemelytron uniformly reddish brown; membrane hyaline, with veins brown and apex of large areole fuliginous.

Description: Holotype female (Fig. 7a) (four specimens measured, holotype first, followed in parentheses by mean and range): Body length 4.85 (4.78, 4.4–5.0); width 2.30 (2.28, 2.1–2.5). Head length 0.30 (0.34, 0.30–0.38); width 1.03 (1.0, 0.95–1.03); distance between eyes 0.53 (0.53, 0.50–0.55); length of antennal segments I 0.48 (0.44, 0.43–0.48), II 1.30 (1.31, 1.30–1.33), III 0.65 (0.65, 0.65–0.65), IV [missing]; labium length 1.25 (1.22, 1.15–1.25). Pronotum length 1.43 (1.37, 1.20–1.45); width 1.75 (1.76, 1.58–1.90); length from anterior margin to transverse suture 0.50 (0.45, 0.40–0.50). Hind leg lengths: Femur 1.58 (1.58, 1.43– 1.68); tibia length 2.25 (2.23, 2.08–2.38); tarsus length 0.35 (0.37, 0.30–0.50). Scutellum length 0.75 (0.73, 0.58–0.80); width 0.88 (0.87, 0.75–0.95). Hemelytron length 4.00 (3.87, 3.63–4.00); width 1.15 (1.14, 1.05– 1.25); length from base to cuneal fracture 2.50 (2.36, 2.18–2.50); length from cuneal fracture to apex of membrane 1.50 (1.52, 1.45–1.60); cuneal length 0.75 (0.75, 0.73–0.80); cuneal width 0.50 (0.49, 0.40–0.53).

PLATE 3. Figure 8: Ambracius rubricosus (Distant) . 8a–b, female color forms (redrawn from Ferreira, 2001); 8c, e, g, i, posterior wall; 8d, f, h, j, sclerotized rings; 8k, endosoma; 8l, left paramere, 8m, right paramere. Figure 9: Ambracius vittatus Carvalho , female holotype (redrawn from Carvalho, 1984).

General coloration reddish brown, with dark brown to black areas. Eyes and apical 2/3 of antennal segment I black; antennal segments II, III, and IV dark brown. Pronotum, scutellum, and hemelytron uniformly reddish brown; membrane hyaline with veins brown and apex of large areola fuliginous; legs reddish brown, femora with a small area near apex fuscous; tibiae with basal two thirds fuscous; tarsi dark brown. Ventral side reddish, with propleura, middle of mesosternum, and meso- and metapleura dark brown; ostriolar peritreme whitish. Labium reaching middle of mesosternum. Pronotum punctate, covered with short pubescence.

Genitalia (Figs. 7b–c): Posterior wall (Fig. 7b) triangular, entire, anterior margin deeply notched, medial surface elliptical, anterior margins narrowed and produced anteriorly; sclerotized rings simple (Fig. 7c), not twisted, with lateral margins thin.

Male (two specimens measured): Body length 4.00 (same for both); width 1.70–1.90. Head length 0.30 (same for both); width 0.88–0.93; distance between eyes 0.45 (same for both); length of antennal segments I 0.33–0.35, II 1.13 [missing], III 0.58 [missing]; IV [missing]; labium length 1.10–1.13. Pronotum length 1.08–1.15; width 1.38–1.43; length from anterior margin to transverse suture 0.35–0.40. Hind leg lengths: Femur 1.35–1.45; tibia 1.80–1.93; tarsus 0.25–0.30. Scutellum length 0.63–0.68; width 0.65–0.75. Hemelytron length 3.35–3.43; width 0.85–0.95; length from base to cuneal fracture 2.00–2.05; length from cuneal fracture to apex of membrane 1.35–1.38; cuneal length 0.58–0.63; cuneal width 0.33–0.40.

Similar to females in morphology and vestiture. Length shorter than females and general color darker red.

Genitalia (Figs. 7d–f): Endosoma (Fig. 7d) with gutterlike structure well developed, apex slightly enlarged, nearly the same length as spine-support structure. Seminal duct well developed with apex enlarged, bearing two spinelike structures. Left paramere (Fig. 7e) falciform with apex acute; sensory lobe strongly developed, bearing many long, erect setae; right paramere (Fig. 7f) reduced, with apex cleft.

Etymology: This species is named after the first author’s good friend, Rudy Bueno, researcher at the Harris County Public Health and Environmental Services Mosquito Control Division, Houston, Texas, who helped and hosted him during his PhD. program at Texas A&M University from 1987 to 1991.

Distribution: Panama.

Host plant: Citrus sp. ( Sapindales , Rutaceae ).

Type material: Holotype Ƥ, Panama, Canal Zone, Christobal, G 63, on Citrus in Quartermaster's Garden, H. F. Dietz, July 6, 1918 ( USNM). Paratypes: 13 (very poor condition), 5 Ƥ, same data as for holotype (5 in TAMU, 1 Ƥ in USNM).

Discussion: We have selected a female holotype for this species because of the very poor condition of the only known male. The male and female genitalia, in combination with the dorsal coloration, are distinct for this species.