Xynocoris tuberculatus Garbelotto & Campos

Garbelotto, Thereza De A., Campos, Luiz A. & Grazia, Jocelia, 2014, Xynocoris, new genus of Ochlerini from Central and South America (Hemiptera: Pentatomidae: Discocephalinae), Zootaxa 3869 (3), pp. 281-305 : 296-297

Xynocoris tuberculatus Garbelotto & Campos sp. nov.

( figs. 2B ; 5B, E ; 6B, F, J ; 7E–H ; 8B; 9 B)

Etymology. The epithet refers to the tubercles on pronotal cicatrices; latin: tuberculatus , bearing tubercles or projections.

Type-locality. Brazil, Mato Grosso (-15.4333; -55.7500).

Male Holotype. BRAZIL, Mato Grosso: (9km W of Chapada dos Guimarães), 27.X.1993, G. M. Nishida, [- 15.4333; -55.7500], at MV Light ( BPBM). Deposited in: BPBM .

Paratypes. VENEZUELA, Aragua: El Limon (450m), 1 female, I-VI.1965, E. Osuma, [9.8500; -66.9000] ( MIZA) Deposited in: MIZA ; 2 females, 3.V.1965, F. Fernandez. Y., [9.8500; -66.9000] ( MIZA) Deposited in: MIZA . BRAZIL, Rio Grande do Norte: Natal, 1 male, XII.1951, M. Alvarenga, [-5.7833; -35.2167], Coleção Campos Seabra ( MNRJ) Deposited in: MNRJ ; Mato Grosso: (12 km S of Posto Gil), 1 female, 26.X.1993, G. M. Nishida, at MV light ( BPBM) Deposited in: BPBM ; Minas Gerais: Nova Era , 1 female, 13.I.1995, J. C. Januncio, [-19.7500; -43.0500] ( UFVB) Deposited in: UFRG . BOLIVIA, Santa Cruz: Buena Vista (3.7km SSE, Hotel Flora & Fauna, 430m), 1 male, 15.XI.2001, M. C. Thomas & B. K. Dozier, [-17.4833; -63.5500], tropical transition forest, BLT ( JEE) Deposited in: JEE .

Description. Body oval; dark brown with yellowish spots between punctures; punctures black. Legs light brown, contrasting with body. Antennae four-segmented, second segment conspicuously wider in males.

Head with spots evenly distributed; punctures coarse, sometimes forming wrinkles. Apices of mandibular plates not touching each other, exceeding clypeus by twice the ocellar diameter; lateral margins of mandibular plates reflected. Eyes on short peduncle. Anteocular processes attaining half the width of eye. Antennal tubercle covered dorsally by the anteocular process. Antennae brown, four-segmented, first segment bearing dorsal longitudinal yellowish spot; proportion of antennal segments: I<II>III<IV, second the longest. Ventrally with 1+1 yellowish carinae posterior to the eyes. Bucculae without anterior tooth. Rostrum yellowish, second segment between pro- and mesocoxae, apex reaching anterior margin of urosternite III; proportion of rostral segments: I<II>III>IV.

Pronotum with yellowish spots mostly on the middle portion; punctures forming wrinkles posterior to cicatrices; cicatrices conspicuously tumid and delimited by deep punctures. Anterior angles of pronotum with projections parallel to the posterior margin of eyes, exceeding laterally the eye by the eye diameter. Anterolateral margins subrectilinear; posterolateral margins convex. Scutellum with yellowish spots denser on post-frenal lobe; anterior margin with median spot and 1+1 yellowish spots near the fovea; punctures forming shallow wrinkles over all surface. Corium reaching connexival segment VI; yellowish spots denser on exocorium; spot on apex of radial vein equivalent to the ocellar diameter. Hemelytral membrane reaching apex of abdomen, bearing seven veins sometimes with bifurcate apex. Pleurae with yellowish spots; sterna black. Evaporatorium black; peritreme reaching half the width of evaporatorium. Legs light brown contrasting with body color; femora and tibiae with brown circular spots; tibiae with few brown spots or transverse bands; tarsi brown.

Segments of connexivum bearing middle yellowish spot. Abdomen ventrally with yellowish spots near lateral margins; punctures shallow to inconspicuous on disc. Yellowish maculae before spiracles present (fig. 8B).

Male. Second antennal segment twice wider then third segment. Measurements (n=3): head length, 1.29 ± 0.10 (1.20–1.40); width, 2.02 ± 0.03 (2.00–2.05); pronotum length, 2.07 ± 0.02 (2.05–2.08); width, 4.76 ± 0.04 (4.72–4.80); scutellum length, 3.29 ± 0.12 (3.15–3.36); width, 2.85 ± 0.17 (2.70–3.04); length of antennal segments: I, 0.56 ± 0.06 (0.50–0.62); II, 1.40 ± 0.11 (1.29–1.50); III, 0.80 ± 0.06 (0.74–0.86); IV, 1.25 ± 0.04 (1.20–1.29); length of rostrum segments: I, 0.68 ± 0.03 (0.65–0.70); II, 1.15 ± 0.07 (1.10–1.20); III, 0.77 ± 0.06 (0.70–0.80); IV, 0.62 ± 0.03 (0.60–0.65); total length, 8.08 ± 0.37 (7.67–8.40); abdominal width, 5.15 ± 0.05 (5.10–5.20).

Genitalia. Pygophore. Dorsal rim concave; distance between projections of dorsal rim shorter than the width of each projection; posterior projections bearing tuft of short setae ( fig. 5B ). Projections of inferior layer of ventral rim subtriangular, apices tumid placed laterally to segment X ( fig. 5B ). Superior layer of ventral rim tumid over the projections of the inferior layer. Median third of ventral rim emarginated forming a shallow, narrow aperture covering the lateral portions of segment X ( fig. 5 E—vr). Carinae continued from the conical projection of inferior layer low and conspicuous ( fig. 5 E—cp). Segment X wider at base, with inconspicuous boundary between sclerotized and membranous areas; lateral margins subrectilinear ( fig. 5B ). Parameres with apical angle acutely curved ( fig. 6B, F, J ); head slightly projected over ventral opening of pygophore ( fig. 5 E—par). Phallus: lateral projection of phallotheca exceeding the dorsal margin ( fig. 7H ). Dorsal process of vesica bilobed ( fig. 7E, H ). Ductus seminis distalis twisted and short, little surpassing the base of phallotheca ( fig. 7E, G, H ).

Female. Measurements (n=5): head length, 1.18 ± 0.06 (1.12–1.25); width, 2.02 ± 0.09 (1.92–2.16); pronotum length, 1.90 ± 0.07 (1.83–2); width, 4.78 ± 0.23 (4.40–4.96); scutellum length, 3.34 ± 0.13 (3.20–3.44); width, 3.10 ± 0.35 (2.64–3.60); length of antennal segments: I, 0.51 ± 0.03 (0.47–0.55); II, 1.24 ± 0.08 (1.13–1.33); III, 0.77 ± 0.07 (0.66–0.82); IV, 1.21 ± 0.03 (1.17–1.25); length of rostrum segments: I, 0.67 ± 0.04 (0.60–0.70); II, 1.10 ± 0.05 (1.05–1.15); III, 0.78 ± 0.06 (0.70–0.85); IV, 0.64 ± 0.03 (0.60–0.65); total length, 8.43 ± 0.3 (8.00–8.80); abdominal length, 5.15 ± 0.36 (4.56–5.52).

Genitalia. Gonocoxites 8 longer than wide; posterior margin slightly convex; middle projection over laterotergites 9 and posterolateral projection over laterotergites 8 equally extended; disc with wide, little projected middle callus (fig. 8 B). Laterotergites 8 longer than wide; middle yellowish spot present (fig. 8B). Gonocoxites 9 diamond shaped, longitudinal suture conspicuous (fig. 8B). Laterotergites 9 reaching at most the band connecting laterotergites 8; sutural angles not touching each other (fig. 8B). Thickening of vaginal intima subtriangular ( fig. 9B ). Ring sclerites placed close to but not touching the lateral limits of the thickening of gonapophyses 9 ( fig. 9B ). Ductus receptaculi anterior to the vesicular area as wide as the intermediary duct; vesicular area about two times longer than pars intermedialis plus capsula seminalis ( fig. 9B ). Length of tubular portion of ductus receptaculi posterior to the vesicular area equals half the length of vesicular area ( fig. 9B ). Pars intermedialis cylindrical, at least four times longer than capsula seminalis, the latter bearing apical processes ( fig. 9B ).

Comments. Xynocoris tuberculatus sp. nov. ( fig. 2B ) emerged as part of ‘clade M’ as sister group of the clade that includes X. parvus ( fig. 1 ; Garbelotto et al. 2013, ‘sp. 07’). Diagnostic characters of X. tuberculatus sp. nov. are the second rostral segment reaching between pro- and mesocoxae and the cicatrices of pronotum conspicuously tumid. This species also has the ventral rim of pygophore strongly emarginated ( fig. 5E ), and the posterior margin of gonocoxites 8 slightly convex (fig. 8B).

Figures

FIGURE 1. Relationships of the Xynocoris clade (Herrichela clade of Ochlerini) modified from Garbelotto et al. (2013).

FIGURE 2. Xynocoris, dorsal: A, X. parvus (male); B, X. tuberculatus sp. nov. (male holotype); C, X. recavus sp. nov. (male holotype); D, X. insularis sp. nov. (female holotype); E, X. egeri sp. nov. (female holotype); F, X. calosus sp. nov. (male holotype). Scale bars = 1 mm.

FIGURE 5. Xynocoris, male genitalia: A–C and G–I, dorsal; D–F and J–L, ventral. A and D, X. parvus; B and E, X. tuberculatus sp. nov.; C and F, X. recavus sp. nov.; G and J, X. calosus sp. nov.; H and K, X. meridionalis sp. nov.; I and L, X. crinitus sp. nov. Abbreviations: cp, conical projection; dr, dorsal rim; pa, posterolateral angle; par, paramere; pil, projection of inferior layer of ventral rim; vr, ventral rim; X, segment X. Scale bars = 1 mm.

FIGURE 6. Xynocoris, right paramere: A–D, dorsal; E–H, ventral; I–L, lateral. A, E and I, X. parvus; B, F and J, X. tuberculatus sp. nov.; C, G and K, X. recavus sp. nov.; D, H and L, X. calosus sp. nov. Scale bar = 1 mm.

FIGURE 7. Xynocoris, phallus. A, E, I and M, dorsal; B, F, J and N, anterior; C, G, K and O, posterior; D, H, L and P, lateral. A–D, X. parvus; E–H, X. tuberculatus sp. nov.; I–L, X. recavus sp. nov.; M–P, X. calosus sp. nov. Abbreviations: dp, dorsal process of phallotheca; ds, ductus seminis distalis; lph, lateral projection of phallotheca; ph, phallotheca; v, vesica; vp, vesica process. Scale bar = 1 mm.

FIGURE 9. Xynocoris, female receptaculum seminis and ausenwand, ventral. A, X. parvus; B, X. tuberculatus sp. nov.; C, X. recavus sp. nov.; D, X. egeri sp. nov.; E, X. calosus sp. nov.; F, X. meridionalis sp. nov.; G, X. lucidus sp. nov. Abbreviations: cm, conical microsculptures; cs, capsula seminalis; dr, ductus receptaculi; gc9, gonocoxites 9; gp9, gonapophyses 9; id, inner duct of vesicular area; la9—laterotergite 9; md, median duct of vesicular area; od, outer duct of vesicular area; pi, pars intermedialis; rs, ring sclerites; tg9, thickening of gonapophyses 9; vi, thickening of vaginal intima. Scale bar = 1 mm.