Xynocoris meridionalis 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: 301-302

publication ID

http://dx.doi.org/10.11646/zootaxa.3869.3.4

publication LSID

lsid:zoobank.org:pub:D4638897-09A5-4699-B2B9-CE079F3D9797

persistent identifier

http://treatment.plazi.org/id/D5668C50-FFD1-3A70-B3C7-7B1F7290C79A

treatment provided by

Plazi

scientific name

Xynocoris meridionalis Garbelotto & Campos
status

sp. nov.

Xynocoris meridionalis Garbelotto & Campos  sp. nov.

( figs. 3 AView FIGURE 3; 5 H, KView FIGURE 5; 8 G; 9View FIGURE 9 F)

Etymology. The epithet refers to the species distribution, the most Southern species in the genus; latin: meridionalis  , from the South.

Type-locality. Paraguay, Salto Del Guaira (-24.0500; -54.3500).

Male holotype. PARAGUAY, Canindiyu: Salto Del Guaira, 28–29.X. 1989, G. Arrigada, [-24.0500; -54.3500], Alitocoris  sp. det. J. E. Eger, 2004, (JEE) Deposited in: AMNHGoogleMaps  .

Paratypes. BRAZIL, Mato Grosso do Sul: Miranda [Salobra], 1 female, I. 1955, Comissão I. O. Cruz , [- 20.2333; - 56.3667] ( MNRJ 1998) Deposited in: MNRJGoogleMaps  ; São Paulo: Piracicaba, 1 female, 12.II. 1966, BL Trap, C. A. Triplehorn, [- 22.7167; - 47.6333] ( JEE) Deposited in: USNMGoogleMaps  ; Campinas, 1 female, Foz Rio das Pedras , X. 1974, [-22.9000; - 47.0833] ( UFRG) Deposited in: UFRGGoogleMaps  ; 1 female, 26.IX. 76, B. C. Lopes, [-22.9000; - 47.0833] ( UFRG) Deposited in: UFRGGoogleMaps  ; Rio Grande do Sul: Viamão , 1 fêmea, 10–11.XII. 1979, M. H. Galileo, [- 30.0833; - 51.0333], col. MCN 13.709, ( MCNZ 16 / 96) Deposited in: MCNZGoogleMaps  ; 1 female, 5–6.XI. 1979, M. H. Galileo, [- 30.0833; - 51.0333], col. MCN 14.087, ( MCNZ 16 / 96) Deposited in: MCNZGoogleMaps  . PARAGUAY, Paraguari: Ybycui , 1 female, 23.XI. 1989, G. Arriagada, [- 26.0167; -57.0500] ( JEE) Deposited in: JEEGoogleMaps  . ARGENTINA: Entre Ríos: Liebig , 1 female, XI. 1987, G. Arriagada, [- 32.1333; - 58.2667] (JEE) Deposited in: AMNHGoogleMaps  ; 4 females, Liebig , XII. 1996, S. R. Caire, [- 32.1333; - 58.2667] ( JEE) Deposited in: 2 ♀ — JEE, 1 ♀ — AMNH, 1 ♀ — USNMGoogleMaps  .

Description. Body oval, brown; punctures black; small yellowish spots evenly distributed. Legs light brown, contrasting with body. Antennae four-segmented, second segment of males little widened.

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

Pronotum with punctures forming wrinkles posterior to cicatrices; yellowish spots on anterolateral margins and posterior to cicatrices; cicatrices flat to slightly tumid. Anterior angles of pronotum with projections parallel to posterior margins of eyes, exceeding laterally the eye by half the eye diameter. Anterolateral margins concave, reflected, anterior half laterally expanded; posterolateral margins subrectilinear. Scutellum with punctures forming wrinkles on disc; anterior margin with median spot and 1 + 1 yellowish spots near the fovea. Corium reaching middle of connexival segment VI; spot on apex of radial vein equals the ocellar diameter, sometimes inconspicuous. Hemelytral membrane reaching the apex of abdomen, bearing seven veins. Pleurae with few yellowish spots. Evaporatorium brown to black; peritreme reaching half the width of evaporatorium. Legs light brown contrasting with body color; femora and tibiae with brown circular spots.

Segments of connexivum bearing yellowish brown spot. Abdomen ventrally with shallow punctures on lateral margins and inconspicuous on disc. Yellowish maculae before spiracles present (fig. 8 G).

Male. Second antennal segment 1 / 3 wider than third segment. Measurements (n= 1): head length, 1.65; width, 2.05; pronotum length, 2.10; width, 4.65; scutellum length, 3.25; width, 2.80; length of antennal segments: I, 0.55; II, 1.30; III, 1.20; IV, 1.70; length of rostrum segments: I, 1.05; II, 1.75; III, 1.25; IV, 1.20; total length, 8.02; abdominal width, 5.36.

Genitalia. Pygophore. Dorsal rim concave; distance between projections of dorsal rim equals twice the width of each projection; anterior projections bearing a tuft of short setae ( fig. 5 HView FIGURE 5). Projections of inferior layer of ventral rim subtriangular, placed laterally to segment X ( fig. 5 HView FIGURE 5). Superior layer of ventral rim slightly tumid near median margin of projections of inferior layer, bearing inconspicuous wrinkles ( fig. 5 HView FIGURE 5). Median third of ventral rim slightly emarginated forming a shallow, narrow aperture covering the lateral portions of segment X ( fig. 5 KView FIGURE 5). Carinae continued from the conical projection of inferior layer inconspicuous ( fig. 5 KView FIGURE 5). Segment X wider at base, with inconspicuous boundary between sclerotized and membranous area; lateral margins sinuous; apex bearing short setae ( fig. 5 HView FIGURE 5). Parameres with apical angle acute, bearing a tuft of long setae; head not projected over the margin of ventral opening of pygophore ( fig. 5 KView FIGURE 5).

Female. Measurements (n= 12): head length, 1.55 ± 0.12 (1.33–1.72); width, 2.09 ± 0.08 (1.99–2.29); pronotum length, 2.10 ± 0.11 (1.95–2.34); width, 4.82 ± 0.23 (4.50–5.27); scutellum length, 3.37 ± 0.09 (3.20–3.50); width, 2.77 ± 0.24 (2.34–3.12); length of antennal segments: I, 0.56 ± 0.05 (0.50–0.63); II, 1.28 ± 0.06 (1.18–1.38); III, 1.16 ± 0.05 (1.08–1.25); IV, 1.75 ± 0.08 (1.65–1.85); length of rostrum segments: I, 1.07 ± 0.05 (1.00– 1.15); II, 1.86 ± 0.15 (1.55–2.10); III, 1.25 ± 0.08 (1.10–1.35); IV, 1.18 ± 0.06 (1.05–1.25); total length, 8.75 ± 0.74 (7.67–9.89); abdominal width, 5.43 ± 0.19 (5.17–5.81).

Genitalia. Gonocoxites 8 longer than wide; posterior margins sinuous; middle projection over laterotergites 9 surpassing the posterolateral projection over laterotergites 8; disc with middle callus, near posterior margins (fig. 8 G). Laterotergites 8 wider than long; middle yellowish spot present in some specimens (fig. 8 G). Gonocoxites 9 diamond –shaped; longitudinal suture conspicuous (fig. 8 G). Laterotergites 9 not surpassing the band connecting laterotergites 8; sutural angles not touching each other (fig. 8 G). Thickening of vaginal intima subrectangular ( fig. 9 FView FIGURE 9). Ring sclerites placed close to but not touching the lateral limits of the thickening of gonapophyses 9 ( fig. 9 FView FIGURE 9). Ductus receptaculi anterior to vesicular area twice wider the intermediary duct; vesicular area two times longer than pars intermedialis plus capsula seminalis ( fig. 9 FView FIGURE 9). Length of tubular portion of ductus receptaculi posterior to the vesicular area equals half the length of vesicular area ( fig. 9 FView FIGURE 9). Pars intermedialis cylindrical, two times longer than capsula seminalis, the later bearing apical processes ( fig 9 FView FIGURE 9).

Comments. Xynocoris meridionalis  sp. nov. ( fig. 3 AView FIGURE 3) emerged as part of a polytomy ( fig. 1View FIGURE 1, ‘clade Q’) with the other two species ( X. lucidus  sp. nov. and X. cupreus  ) with four –segmented antennae ( Garbelotto et al. 2013, ‘sp. 01’). Diagnostic characters of X. meridionalis  sp. nov. are the shape of female genital plates (fig. 8 G), with the middle projection over laterotergites 9 surpassing the posterolateral projection over laterotergites 8, and the presence of a tuft of short setae on anterior projections of dorsal rim of pygophore ( fig. 5 HView FIGURE 5).

AMNH

USA, New York, New York, American Museum of Natural History

MNRJ

Brazil, Rio de Janeiro, Sao Cristovao, Universidade do Rio Janeiro, Museu Nacional

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

UFRG

Brazil, Rio Grande do Sul, Porto Alegre, Universidade Federal do Rio Grande do Sul, Instituto de Biologia

MCN

Brazil, Rio Grande do Sul, Porto Alegre, Museu de Ciencias Naturais da Fundacao Zoo-Botanica do Rio Grande do Sul

MCNZ

Brazil, Rio Grande do Sul, Porto Alegre, Museu de Ciencias Naturais da Fundacao Zoo-Botanica do Rio Grande do Sul

AMNH

American Museum of Natural History

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

USNM

Smithsonian Institution, National Museum of Natural History

UFRG

Instituto de Biologia

MCNZ

Porto Alegre, Museu de Ciencias Naturais da Fundacao Zoo-Botanica do Rio Grande do Sul