Ischnodemus formosus, 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/9877BB27-5B95-4C0F-BFF5-7466F3045526 |
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taxon LSID |
lsid:zoobank.org:act:9877BB27-5B95-4C0F-BFF5-7466F3045526 |
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treatment provided by |
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scientific name |
Ischnodemus formosus |
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sp. nov. |
Ischnodemus formosus sp. nov.
Figs 2B View Figure 2 , 4B View Figure 4 , 5B View Figure 5 , 6B View Figure 6
Lsid link.
http://lsid.speciesfile.org/urn:lsid:Lygaeoidea.speciesfile.org:TaxonName:518389.
Type material.
Holotype ARGENTINA • male; Formosa, ruta 14, 12 km NW Colonia Pastoril; 25.571°S, 58.322°W; 11-XII-2018; Dellapé & Melo cols.; MLP he-10554. Paratypes: ARGENTINA - Formosa Prov. • 6 males 8 females; same data as for holotype; MLP he-10555 to he10560 (males) he-10561 to he-10568 (females) • 2 males 2 females; same data as for preceding; MACN • 2 males 2 females; same data as for preceding; USNM • 1 male 1 female; P.N. Rio Pilcomayo; 25.571°S, 58.322°W; 11-XII-2018; Dellapé & Melo cols.; MLP he-10569, he-10570 • 15 males, 9 females, 4 5th instars & 1 4th instar; Prov. Rd 2, rd to Clorinda off small side rd, 175 m; 25°35.243'S, 58°19.303'W; 11-XII-2018; Henry, T.J. col.; ex sedges; USNM.
Description
(male holotype). (Fig. 2B View Figure 2 ) Total length 5.63. Head, pronotum and scutellum shallowly punctate except on shiny transverse band on posterior pronotal lobe; sparsely clothed with short decumbent, semidecumbent and erect setae.
Head grey-black, pruinose dorsally except shiny clypeus and antenniferous tubercles. Head length 0.70, head width 0.88, interocular space 0.55. 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 0.30, II 0.40, III 0.36, IV 0.40. Antennae dark brown, apex of pedicellus and basiflagellomere, and distiflagellomere distally paler; with abundant decumbent and sparse semierect setae; scapus slightly surpassing apex of clypeus, antennal segments length: scapus 0.23, pedicellus 0.64, basiflagellomere 0.58, distiflagellomere 0.72.
Pronotum (Fig. 4B 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 1.07, pronotum width 1.22. Anterior pronotal lobe grey-black, pruinose with intermixed small shiny spots, collar entirely pruinose; posterior pronotal lobe with a complete transverse shiny and smooth band, posterior margin entirely pruinose. Metathoracic scent gland auricle slightly produced anteriorly, yellowish basally. 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 decumbent short setae. Hemelytra surpassing half the length of 6th abdominal tergum, length 3.04. Hemelytra creamy white, except apical area of corium orange brown, and with dark brown as follows: basal one fourth and apex of clavus, a broad band along posterior margin attaining the orange brown macula extending anteriorly over Cu vein, and a well delimited and contrasting rounded dark macula on membrane. Sterna pruinose, except a rectangular shiny area on mesosternum.
Abdomen brown to dark brown, connexiva paler. Male genitalia: Pygophore (Fig. 5B View Figure 5 ) dorsal aperture relatively short, anterior margin slightly rounded, inner projections subtriangular, posterior margin with a small concavity medially. Parameres: blade long, outer projection thumb like (Fig. 6B View Figure 6 ).
Etymology.
The epithet is the Latin adjective formosus, - a, - um, meaning ‘beautiful’, also referring to Formosa, the Argentinean province where the type material was collected.
Distribution.
Only known from Formosa Province, Argentina.
Measurements of paratypes
(min-max, mean). Males (n = 4): Total length 5.50-5.81, 5.65. Head length 0.73-0.81, 0.75, head width 0.88-0.96, 0.91, interocular space 0.55-0.60, 0.57, interocellar space 0.31-0.36, 0.33. Labial segments length: I 0.32-0.34, 0.32, II 0.38-0.40, 0.39, III 0.30-0.40, 0.35, IV 0.38-0.40, 0.39. Antennal segments length: scapus 0.20-0.22, 0.22 pedicellus 0.60-0.70, 0.64, basiflagellomere 0.50-0.62, 0.55, distiflagellomere 0.74-0.78, 0.75. Pronotum length 1.04-1.12, 1.08, pronotum width 1.17-1.25, 1.21. Hemelytra length 2.96-3.28, 3.07.
Females (n = 5): Total length 6.56-7.72, 7.10. Head length 0.83-0.88, 0.85, head width 0.96-1.07, 1.01, interocular space 0.60-0.68, 0.63, interocellar space 0.36-0.42, 0.40. Labial segments length: I 0.34-0.42, 0.38, II 0.42-0.50, 0.45, III 0.40-0.46, 0.42, IV 0.42-0.52, 0.47. Antennal segments length: scapus 0.22-0.26, 0.24 pedicellus 0.60-0.70, 0.65, basiflagellomere 0.54-0.64, 0.59, distiflagellomere 0.76-0.88, 0.78. Pronotum length 1.07-1.33, 1.21, pronotum width 1.33-1.53, 1.42. Hemelytra length 3.36-3.92, 3.68.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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