Ischnodemus infernalis, Dellapé & Melo, 2022
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publication ID |
https://dx.doi.org/10.3897/dez.69.94683 |
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publication LSID |
lsid:zoobank.org:pub:BEB66BA2-96C6-4356-84B1-AF7E13F62456 |
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persistent identifier |
https://treatment.plazi.org/id/4433E5BC-9337-4014-94C6-92BB0F8BD2C5 |
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taxon LSID |
lsid:zoobank.org:act:4433E5BC-9337-4014-94C6-92BB0F8BD2C5 |
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treatment provided by |
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scientific name |
Ischnodemus infernalis |
| status |
sp. nov. |
Ischnodemus infernalis sp. nov.
Figs 3A View Figure 3 , 4C View Figure 4 , 5C View Figure 5 , 6C View Figure 6
Lsid link.
http://lsid.speciesfile.org/urn:lsid:Lygaeoidea.speciesfile.org:TaxonName:518391.
Type material.
Holotype ARGENTINA • male; Chaco, 2.3 km S Pampa del Infierno; 26.529°S, 61.185°W; 18-XII-2018; Dellapé, P.M. col.; MLP he-10571. Paratypes: ARGENTINA - Chaco Prov. • 11 males 7 females; same data as for holotype; MLP he-10572 to he-10582 (males) he-10583 to he-10589 (females) • 2 males 2 females; same data as for preceding; USNM • 2 males 2 females; same data as for preceding; MACN • 1 male; SE side of Corzuela, off Natl. Rd. 80, 200 m; 26°57.090'S, 60°59.022'W; 19 Dec. 2018; Henry, T.J. col.; USNM • 1 male 5 females; 3 km S of Pampa del Infierno, Prov. Rd. 5, 150 m; 26°31.779'S, 61°11.092'W; 18-XII-2018; Henry, T.J. col; on Cortaderia sp.; USNM.
Description
(male holotype). (Fig. 3A View Figure 3 ) Total length 5.69. Head, pronotum and scutellum punctate except posterior one fifth of pronotum smooth; sparsely clothed with short decumbent, semidecumbent and erect setae.
Head black, clypeus paler, shagreened and shiny dorsally. Head length 0.73, head width 0.88, interocular space 0.52. Vertex flat, eyes ovoid, and set well away from anterolateral pronotal angles. Ocelli relatively large, interocellar space 0.34, closer to anterior margin of pronotum than to the eyes. Labium short attaining anterior margin of mesosternum. Labial segments length: I 0.40, II 0.34, III 0.32, IV 0.26. Antennae brown, apex of pedicellus and basiflagellomere and distiflagellomere paler; with abundant semierect setae; scapus slightly surpassing apex of clypeus, antennal segments length: scapus 0.20, pedicellus 0.42, basiflagellomere 0.46, distiflagellomere 0.66.
Pronotum (Fig. 4C View Figure 4 ) slightly sinuate laterad, narrowing gradually from mid-length of anterior lobe to collar; transverse impression shallow, nearly obsolete; posterior margin concave. Pronotum length 1.14, pronotum width 1.01. Pronotum shagreened and black except posterior one fifth smooth and brown, shiny with pruinose areas restricted to irregular patches. Humeral lobes lateral to scutellum pruinose. Metathoracic scent gland auricle slightly produced anteriorly, yellowish basally and brown dorsally. Scutellum grey-black, pruinose, with a longitudinal median fringe without punctures. All femora moderately incrassate, mutic. Coxae and femora dark brown, femora paler apically; trochanters, tibiae and tarsi light brown. All legs with abundant semierect and decumbent short setae. Hemelytra reaching mid-length of 6th abdominal tergum, length 3.16. Hemelytra yellowish, except apical area of corium orange brown, and with dark brown as follows: basal one fourth of clavus, apical half of Cu vein and posterior margin of corium extending to outer margin of corium adjacent to the orange brown apical area, and a large irregular and diffuse median macula on membrane not contacting posterior margin of corium next to orange macula. Sterna pruinose, except a rectangular shiny area on mesosternum.
Abdomen brown irregularly pigmented. Male genitalia: Pygophore (Fig. 5C View Figure 5 ) dorsal aperture elongate, anterior margin slightly rounded, inner projections short, posterior margin deeply concave medially. Parameres: blade long, outer projection thumblike, small (Fig. 6C View Figure 6 ).
Intraspecific variation.
The antenna varies from uniformly dark brown to brown with the distiflagellomere darker. The anterior pronotal lobe shows a median shallow longitudinal sulcus. Femora of some specimens less pigmented, and tibiae somewhat darker, not strongly contrasting with femora. Some specimens show the median macula of the membrane darker and well defined; the brown pattern of corium is restricted to the distal area adjacent to the orange area or can extend anteriorly to the apex of clavus.
Etymology.
The specific epithet is the Latin adjective infernalis, - is, - e, meaning ‘infernal’, referring to the locality 'Pampa del Infierno’ where the holotype and most of the paratypes were collected.
Distribution.
Only known from Chaco Province, Argentina.
Measurements of paratypes
(min-max, mean). Males (n = 4): Total length 5.56-5.94, 5.71. Head length 0.68-0.75, 0.71, head width 0.83-0.94, 0.88, interocular space 0.55-0.62, 0.56, interocellar space 0.31-0.36, 0.34. Labial segments length: I 0.32-0.40, 0.38, II 0.32-0.40, 0.36, III 0.32-0.38, 0.34, IV 0.28-0.40, 0.32. Antennal segments length: scapus 0.18-0.20, 0.20 pedicellus 0.50-0.56, 0.50, basiflagellomere 0.42-0.46, 0.45, distiflagellomere 0.62-0.64, 0.64. Pronotum length 1.07-1.17, 1.13, pronotum width 1.01-1.09, 1.04. Hemelytra length 2.92-3.20, 3.07.
Females (n = 5): Total length 7.12-7.68, 7.41. Head length 0.81-0.83, 0.83, head width 0.96-1.01, 0.99, interocular space 0.62-0.65, 0.64, interocellar space 0.36-0.42, 0.39. Labial segments length: I 0.36-0.40, 0.40, II 0.40-0.48, 0.44, III 0.34-0.40, 0.44, IV 0.36-0.40, 0.38. Antennal segments length: scapus 0.20-0.26, 0.24 pedicellus 0.56-0.60, 0.59, basiflagellomere 0.50-0.56, 0.54, distiflagellomere 0.64-0.76, 0.71. Pronotum length 1.12-1.20, 1.19, pronotum width 1.30-1.40, 1.34. Hemelytra length 3.00-3.76, 3.49.
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