Xynocoris recavus 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 : 295-296

Xynocoris recavus Garbelotto & Campos sp. nov.

( figs. 2C ; 5C, F ; 6C, G, K ; 7I –L ; 8C; 9 C)

Etymology. The epithet refers to the deep concavity of the dorsal rim of pygophore; latin: recavus , concave.

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

Male Holotype. BRAZIL: Mato Grosso: (9 km 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 male, 25.V.1966, F. Fernandez. Y., [9.8500; -66.9000] ( MIZA) Deposited in: MIZA . BRAZIL, Mato Grosso: (9km W of Chapada dos Guimarães), 2 females and 2 males, 27.X.1993, G. M. Nishida, [-15.4333; -55.7500], at MV Light ( BPBM) Deposited in: BPMP ; Minas Gerais: Viçosa, 1 male, 26.XI.1986, P. S. Fiuza F., [-20.7500; -42.8833] ( UFVB) Deposited in: UFRG ; São Paulo: Piracicaba, 2 males, 10.X.1965, [-22.7167; -47.6333] ( DBTC) Deposited in: DBTC ; 1 male, 10.X.1965, [-22.7167; -47.6333] ( AMNH) Deposited in: AMNH ; Rio de Janeiro: Itatiaia, 1 female, 6.XI.1950, M. Zikán, [-22.5000; - 44.5667] ( MNRJ) Deposited in: MNRJ ; Rio de Janeiro, 1 male, I.1977, M. Alvarenga, [-22.9000; -43.2333] ( MNRJ) Deposited in: UFRG .

Description. Body oval, brown; punctures black, confluent and forming wrinkles on pronotum and scutellum; small yellowish spots evenly distributed over all body surface. Legs light brown, contrasting with body. Antennae five-segmented, third segment conspicuously wider in males.

Head with yellowish median longitudinal spot from apex of mandibular plates to the vertex; punctures non confluent. Apices of mandibular plates sometimes not touching each other, exceeding clypeus by twice the ocellar diameter; lateral margins strongly reflected. Eyes on short peduncle. Anteocular processes projected, with punctures, attaining half of the width of eye. Antennal tubercle covered dorsally by anteocular process. Antennae brown, five-segmented; first segment bearing dorsal longitudinal yellowish spot; segments III–V paler; proportion of antennal segments: I≈II<III≈IV<V, fifth the longest. Ventrally, mandibular plates apices and margin yellowish; with 1+1 yellowish carinae posterior to the eyes. Bucculae without anterior tooth. Rostrum yellowish, second segment reaching mesocoxae, apex on urosternite III; proportion of rostral segments: I<II>III>IV.

Pronotum with punctures forming wrinkles posterior to cicatrices; yellowish spots between punctures; cicatrices slightly tumid. Anterior angles of pronotum with projections parallel to the posterior margins of eyes, exceeding laterally the eye by almost the eye diameter. Anterolateral margins slightly concave, reflected, and expanded on anterior half; posterolateral margins slightly convex. Scutellum with yellowish spots between punctures; anterior margin with median spot and 1+1 yellowish spots near the fovea, sometimes inconspicuous; punctures forming wrinkles evenly distributed, inconspicuous on apex. Corium reaching middle of connexival segment VI; spot on apex of radial vein equivalent to the ocellar diameter. Hemelytral membrane reaching or surpassing the apex of abdomen, bearing seven or eight veins. Pleurae with yellowish spots between punctures. Evaporatorium black; peritreme surpassing half the evaporatorium width. Legs yellowish contrasting with body color; femora and tibiae with brown circular spots, if confluents forming ventral transversal bands on tibiae.

Segments of connexivum bearing middle yellowish spot. Abdomen pubescent; yellowish spots distributed on lateral portions; punctures inconspicuous on disc. Yellowish maculae before spiracles present (fig. 8C).

Male. Third antennal segment twice wider than fourth segment. Measurements (n=9): head length, 1.28 ± 0.13 (1.08–1.44); width, 1.97 ± 0.08 (1.86–2.16); pronotum length, 1.96 ± 0.15 (1.79–2.25); width, 4.69 ± 0.35 (4.41–5.59); scutellum length, 3.18 ± 0.23 (2.89–3.68); width, 2.82 ± 0.12 (2.70–3.09); length of antennal segments: I, 0.55 ± 0.03 (0.49–0.59); II, 0.43 ± 0.09 (0.35–0.66); III, 1.01 ± 0.12 (0.83–1.17); IV, 0.85 ± 0.07 (0.74–0.96); V, 1.43 ± 0.19 (1.21–1.86); length of rostrum segments: I, 0.78 ± 0.04 (0.75–0.85); II, 1.26 ± 0.04 (1.20–1.35); III, 0.82 ± 0.07 (0.75–0.95); IV, 0.68 ± 0.04 (0.60–0.70); total length, 7.85 ± 0.22 (7.56–8.18); abdominal width, 5.10 ± 0.25 (4.80–5.68).

Genitalia. Pygophore. Dorsal rim deeply concave; distance between projections of dorsal rim equals 1.5 times the width of each projection; posterior projections bearing a tuft of short setae ( fig. 5C ). Projections of inferior layer of ventral rim subtriangular, apices slightly tumid placed laterally to segment X ( fig. 5C ). Superior layer of ventral rim with small tumid areas near median margin of projections of inferior layer ( fig. 5C ). Ventral rim uniformly excavated, forming a shallow, narrow aperture covering the lateral portions of segment X ( fig. 5C ). Carinae continued from the conical projection of inferior layer low and conspicuous ( fig. 5F ). Segment X slightly wider at base, with an inconspicuous boundary between sclerotized and membranous areas; lateral margins sinuous; apex bearing short setae on lateral third ( fig. 5C ); genital opening reaching the apex of segment X ( fig. 5F ). Parameres with apical angle truncated ( fig. 6C, G, K ); head at most reaching the margin of ventral rim ( fig. 5F ), with short setae on ventral surface; posterior margin subrectilinear ( fig. 6C, G, K ). Phallus: lateral projection of phallotheca exceeding the dorsal margin, apex truncated ( fig. 7L ). Dorsal process of vesica short, not bilobed ( fig. 7I ). Ductus seminis distalis twisted, longer than twice the phallotheca length, apical gutter deep ( fig. 7I, K, L ).

Female. Measurements (n=3): head length, 1.17 ± 0.16 (1.01–1.32); width, 1.92 ± 0.21 (1.68–2.06); pronotum length, 1.95 ± 0.26 (1.68–2.21); width, 4.67 ± 0.60 (4.02–5.19); scutellum length, 3.23 ± 0.44 (2.73–3.53); width, 2.85 ± 0.35 (2.46–3.14); length of antennal segments: I, 0.57 ± 0.08 (0.50–0.66); II, 0.47 ± 0.06 (0.40–0.53); III, 0.90 ± 0.11 (0.78–0.99); IV, 0.82 ± 0.05 (0.78–0.87); V, 1.52 ± 0 (1.52–1.52); length of rostrum segments: I, 0.77 ± 0.03 (0.75–0.80); II, 1.30 ± 0.10 (1.20–1.40); III, 0.9 ± 0.05 (0.85–0.95); IV, 0.72 ± 0.03 (0.70–0.75); total length, 7.92 ± 0.84 (7.02–8.67); abdominal width, 4.96 ± 0.62 (4.25–5.39)

Genitalia. Gonocoxites 8 longer than wide; posterior margins slightly sinuous; middle projection over laterotergites 9 and posterolateral projections over laterotergites 8 equally extended; disc with low callus on middle (fig. 8C). Laterotergites 8 wider than long, bearing shallow punctures and middle yellowish spot (fig. 8C). Gonocoxites 9 diamond-shaped; longitudinal suture conspicuous (fig. 8C). Laterotergites 9 at most reaching the band connecting laterotergites 8 (fig. 8C). Thickening of vaginal intima subtriangular ( fig. 9C ). Ring sclerites placed close to but not touching the lateral limits of the thickening of gonapophyses 9 ( fig. 9C ). Ductus receptaculi anterior to the vesicular area as wide as the intermediary duct; vesicular area at least twice the length of pars intermedialis plus capsula seminalis ( fig. 9C ). Length of tubular portion of ductus receptaculi posterior to the vesicular area equals 1/3 the length of vesicular area ( fig. 9C ). Pars intermedialis cylindrical, at least four times longer than capsula seminalis, the latter bearing apical processes ( fig. 9C ).

Comments. Xynocoris recavus sp. nov. ( fig. 2C ) is placed on the base of ‘clade L’, the first dichotomy of Xynocoris gen. nov. clade ( fig. 1 ; Garbelotto et al. 2013, ‘sp. 04’). Diagnostic characters of X. recavus sp. nov. are the rostral length, reaching at most the posterior margin of urosternite III, the dorsal rim of pygophore deeply concave, and the ventral rim uniformly excavated ( fig. 5C, F ). This is also the only species of Xynocoris gen. nov. without bilobed dorsal process of vesica and with the apex of basal processes of phallotheca truncated ( fig. 7I, L ).

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.