Ladeaschistus borgesi Bianchi, Cioato & Grazia

Cioato, Alana, Bianchi, Filipe Michels, Eger, Joseph & Grazia, Jocelia, 2015, New species of Euschistus (Euschistus) from Jamaica, Euschistus (Mitripus) and Ladeaschistus from southern South America (Hemiptera: Heteroptera: Pentatomidae: Pentatominae), Zootaxa 4048 (4), pp. 565-574: 570-573

publication ID

http://dx.doi.org/10.11646/zootaxa.4048.4.7

publication LSID

lsid:zoobank.org:pub:3F0F58CB-EE87-4DCA-B599-F2583A5B025B

persistent identifier

http://treatment.plazi.org/id/03A60067-8A30-FFCF-FF38-C9F293B5F9DE

treatment provided by

Plazi

scientific name

Ladeaschistus borgesi Bianchi, Cioato & Grazia
status

sp. nov.

Ladeaschistus borgesi Bianchi, Cioato & Grazia   sp. nov.

Etymology. Named in honor of Jorge Luis Borges, one of the most important writers from South-America. This late Argentinean writer is a milestone of literary fiction with his metaphysical tales, essays, and poetry.

Distribution. Argentina: Chaco, Salta, Tucumán; Bolivia: Santa Cruz; Brazil: Mato Grosso, São Paulo, Santa Catarina; Paraguay: Central, Horcheta.

Type material. Holotype ♂. BRAZIL, São Paulo: São José do Rio Preto (IBILCE-UNESP), 12.I. 2009, Souza, H. V. col. [- 20.7869, - 49.3606] ( UFRG). GoogleMaps  

Paratypes. ARGENTINA, Chaco: 9 de julio. 1 ♂ 2 ♀, II. 1996, O. E. Gonzalez col. ( FSCA).   Charata, 1 ♂, XI. 1994 to I. 1995 ( DAR).   Formosa. 1 ♂ (without abdomen), Martines, E. ( MACN).   Salta: Urundel . 2 ♀ (one without abdomen), 25.I. 1950, Golbach col. ( IFML).   Tucumán: 1 ♂, II. 1950, Wygo Coll. ( USNM).   El Cadillal . 1 ♂ (without pygophore), 26.II. 1966, Barrera, M. col. ( IFML).   BOLIVIA, Santa Cruz: Sara ( Nueva Moka ). 1 ♂ (without pygophore) I. 1963, Martinez, A. col. ( MZSP).   2 ♀ (one without abdomen), I. 1963, Martinez, A. col. ( MZSP).   BRAZIL, Mato Grosso: Cáceres . 1 ♂ (without pygophore), 10.III. 1985, Elias, C. col. ( MZSP).   Riacho do Herval ( Rio Paraná ). 3 ♀ (three without abdomen), ( MZSP).   Ribeirãozinho . 1 ♂, 12.II. 1962, Bechyné, J. col. ( MZSP).   Três Lagoas , 2 ♂, 15.V. 1964 ( MZSP).   Santa Catarina: Guatambú ( FLONA de Chapecó ). 1 ♀, 18.IX. 2004, Bianchi, F. M. col. [- 27.0972, - 52.7778] ( UFRG). GoogleMaps   São Paulo: São José do Rio Preto (IBILCE-UNESP) 4 ♂ (three without pygophore), 12.I. 2009, Souza, H. V. col. [- 20.7869, - 49.3606] ( UFRG). GoogleMaps   3 ♀ (two without abdomen), 12.I. 2009, Souza, H. V. col. [- 20.7869, - 49.3606] ( UFRG). GoogleMaps   PARAGUAY, Central: Areguá . 1 ♂ 1 ♀, 10.V. 2006, C. Aguilar col. ( JEEC).   Central: Asunción . 1 ♂, 11–30.X. 1990, G. Arrigada col. ( JEEC).   Central: Capiatá . 1 ♀, 21.II. 1994, G. Arrigada col. ( JEEC).   Central, near Nemby, 1 ♂ 3 ♀, 11.I. 1983, Coll. E. G. Riley ( DAR);   Horqueta, 57 - 10, W. 23–24, N., 44 Kilim. East Paraguay Riv, 1 ♂, I. 2.1936, Alberto Schulze, J. C. Lutz Collection 1961 ( USNM).  

Description. Head: Longer than wide. Mandibular plates slightly surpassing clypeus, apices acuminate. Antennae variable, usually pale yellow, but presenting patterns of apex darker than base, in some specimens presenting dark bands at apex of III, IV and V segments. Bucculae evanescent at base of head. Rostrum slightly surpassing metacoxae.

Thorax: Anterolateral margins denticulate at least along anterior half, denticles pale yellow; Humeri varying from obtuse when undeveloped to acutely projected, directed laterad, but not forming a sharp spine; cicatrices of pronotum bearing callus at basal angles, concolorous. Scutellum with small fovea present at basal angles, sometimes flanked by whitish spot; medial whitish spot present on basal margin. Membrane of hemelytra fumose. Ventrally with dark spot at supracoxal cleft of each pleurite, plus at middle metaepimeron. Evaporatorium unpunctured, not reaching halfway between the ostiole and the lateral margin of metapleuron; peritreme spoutshaped. Metasternum carinate. Legs concolorous with ventral surface of thorax; femora armed with spine, small dark spot at base of each spine; pro- and mesofemora bearing two pairs of dark preapical tubercles, the apical pair bigger than basal.

Abdomen: Connexivum dark brown, bearing a pale yellow spot between anterior and posterior angles. Spiracles concolorous with ventral surface of abdomen.

Male Genitalia. ( Figs. 19–24 View FIGURES 19 – 28 ) Ventral rim of pygophore deep-concave, middle third flat. Dorsal rim with median third and lateral margins straight, diverging. Superior processes of dorsal rim of pygophore in a large subquadrangular tubercles, located near the base of the paramere. A pair of acute denticles, placed at inner margin of posterolateral angles of pygophore. ( Fig. 25 View FIGURES 19 – 28 ) Parameres with broad head, flat dorsoventrally, curved at a 60 ° angle. Phallus. ( Figs. 26–28 View FIGURES 19 – 28 ) Processes of the phallotheca curved dorsally, slightly divergent and narrowing towards apex. Conjunctiva with tapered lateral lobes, median lobe sclerotized; ductus seminis distalis not coiled, not reaching the processus vesicae; length of conjunctiva and vesica together corresponds to one third the length of phalloteca.

Measurements: (n= 10) Body length 7.8 (7.30–8.50) abdominal width 2,96 (2.77–3.09) head length 1.72 (1.64– 1.84) length before eyes 0.94 (0.84–1.08); head width 1.8 (1.68–1.84); interocular distance 0.98 (0.96 –1.00); length of antennal segments: I 0.53 (0.50–0.62); II 0.77 (0.67–0.84); III 0.91 (0.74–0.99); IV 1.39 (1.21–1.43); V 1.55 (1.46–1.61); pronotum length 1.75 (1.55–1.86); pronotum width 5.29 (4.78–5.61); scutellum length 2.89 (2.58–2.96); scutellum width 3.02 (2.58–2.96).

Female Genitalia: ( Figs. 29–31 View FIGURES 29 – 31 ) Gonocoxites 8 with sutural margin slightly sinuous, sutural angle acute, projected over gonocoxites 9, posterior margin concave. Gonocoxites 9 with obtuse posterolateral angles, surface biconcave. Laterotergites 8 acute, forming a black spine at apex. Laterotergites 9 obtuse at apex, exceeding the band that unites laterotergites 8 dorsally. Gonapophyses 9 with secondary thickening. Chitinelipsen elliptical. Thickening of vaginal intima with anterior and posterior regions subtriangular. Ductus receptaculi before vesicular area, shorter than this area. Ductus receptaculi after vesicular area shorter than pars intermedialis, dilated near the anterior annular flanges. Annular flanges convergent. Pars intermedialis subequal in length to capsula seminalis. Capsula seminalis elongated, digitiform.

Measurements: (n= 10) Body length 8.95 (8.1–9.3); abdominal width 3.34 (2.90–4.46); head length 1.84 (1.68– 2.12); length before eyes 1.00 (0.88 –1.00); head width 1.92 (1.80 –2.00); interocular distance 1.1 (1.00± 1.12); antennal segments length: I 0.54 (0.50–0.62); II 0.81 (0.65–0.90); III 0.98 (0.90–1.36); IV 1.41 (0.93–1.58); V 1.52 (1.46–1.67); pronotum length 1.97 (1.83–2.01); pronotum width 5.80 (5.04–5.92); scutellum length 3.18 (3.02– 3.21); scutellum width 3.34 (3.15–3.46).

Comments. Ladeaschistus borgesi   (habitus Fig. 3 View FIGURES 1 – 3 ), L. boliviensis and L. armipes   present the same pattern of male genitalia, with the ventral rim broadly with excavation deep-concave, middle third flat. The “facies” of L. borgesi   resembles that of L. bilobus and L. trilobus, but the non-emarginated ventral rim of pygophore will distinguish L. borgesi   .

UFRG

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

FSCA

USA, Florida, Gainesville, Division of Plant Industry, Florida State Collection of Arthropods

DAR

DAR

MACN

Argentina, Buenos Aires, Museo Argentina de Ciencias Naturales

IFML

IFML

USNM

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

MZSP

Brazil, Sao Paulo, Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

UFRG

Instituto de Biologia

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

DAR

Plant Pathology Herbarium

MACN

Museo Argentino de Ciencias Naturales Bernardino Rivadavia

USNM

Smithsonian Institution, National Museum of Natural History

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo