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2025
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| Online-Zugang: | https://doi.org/10.5281/zenodo.17251849 |
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- <p><b><i>Derelomus karooensis</i> Haran sp. nov.</b></p><p>urn:lsid:zoobank.org:act: B88668D9-2A4C-49DD-9A26-C4B2B5C39AC2</p><p>Fig. 3</p><p><b>Diagnosis</b></p><p><i>Derelomus karooensis</i> sp. nov. can be distinguished by the combination of white scales on the lateral carina of the pronotum, the distinctly transverse pronotum (W: L ratio: 1.33), two transverse bands or lines of dark spots on the elytra, a black club, and the comparatively short body of the penis (Fig. 3D). It is closest to <i>D. acuminatus</i> sp. nov., see key of species for diagnostic features. GenBank accession number for the corresponding DNA barcode: ON553427.</p><p><b>Etymology</b></p><p>The specific epithet refers to the area of origin of most of the studied specimens, the Karoo region in the Republic of South Africa.</p><p><b>Material examined</b></p><p><b>Holotype</b></p><p>REPUBLIC OF SOUTH AFRICA • ♂; “Rep. of South Africa; WC. Pr. [Western Cape province], Groenfontein; Guest Farm, 16.i.2019; J. Haran coll.” “ JHAR02095-01; -33.448 21.793 [33°26′52.8″ S, 21°47′34.8″ E]; Light trap; Collection – Cirad” “HOLOTYPE ♂; <i>Derelomus karooensis</i>; Haran, 2025”; SAMC.</p><p><b>Paratypes</b></p><p>REPUBLIC OF SOUTH AFRICA – <b>Western Cape Province</b> • 4 ♀♀; LittleKaroo, Raubenheimer dam; 33°24′57″ S, 22°18′58″ E; 30 Oct. 1993; Endrödy-Younga coll.; beating <i>Acacia</i> [<i>Vachellia</i>]; E-Y:2922; TMSA • 1 ♀; same collection data as for preceding; CBGP • 1 ♀; Mossel Bay; 34°12′04″ S, 22°05′57″ E; Jan. 1922; R.E. Turner coll.; NHMUK • 1 ♀; same locality as for preceding; Dec. 1921; R.E. Turner coll.; NHMUK. – <b>Eastern Cape Province</b> • 2 ♀♀; Baviaanskloof, near Patensie; 33°38′00″ S, 24°28′59″ E; 23 Nov. 1983; R. Oberprieler coll.; SANC • 1 ♀; Dunbrody; 33°28′12″ S, 25°32′46″ E; 19 Sep. 1900; NHMUK • 1 ♀; Dunbrody; 33°28′12″ S, 25°32′46″ E; 20 Dec. 1900; NHMUK • 1 ♀; Uitenhage; 33°45′36″ S, 25°21′30″ E; Oct. 1998; J. Onui (?); on <i>Mimosa</i> L.; NHMUK • 1 ♀; between Somerset East and Swaarshoek; 32°34′59″ S, 25°26′00″ E; 6 Feb. 1990; V.M. Uys coll.; SANC • 1 ♀; Somerset East;; 32°43′48″ S, 25°35′10″ E; 1–26 Jan. 1931; R.E. Turner coll.; NHMUK.</p><p><b>Description</b> (♂)</p><p>MEASUREMENTS. Body length 2.5 mm.</p><p>COLOR. Body integument pale brown, club black, elytra with two transverse oblique dark bands forming an “X” near middle of length; vestiture of dorsum made of minute white setae, integument glabrous in appearance.</p><p>HEAD. Rostrum as long as pronotum in lateral view, downcurved near base, almost straight in apical ⅔; in dorsal view 2.5× as long as wide, integument densely punctate, with 4 carinae, covered with short suberect whitish setae oriented transversally; antennae inserted near apical ¼ of length; head capsule coarsely punctate in dorsal view, with suberect whitish scales forming two tufts near eyes oriented toward centre of forehead; eyes convex, exceeding lateral curve of head capsule in dorsal view; antennal funicle with first segment 1.5× as long as wide, equal in length to segments 2–3 together, 2 isodiametric, 3–7 transverse.</p><p>PRONOTUM. Wider than long (W: L ratio: 1.33), widest near apical ⅓, 0.77× as wide there as elytra at humeral angles, lateral carina forming an obtuse angle at apical ⅓ of length; sides abruptly converging in apical ¼, apical constriction shallow; integument with large circular punctures, space between punctures dull, narrower than or as wide as diameter of punctures; cover denser along lateral carinae.</p><p>METATHORAX. Metanepisterna with scarce setiform scales.</p><p>ELYTRA. Elongate (W: L ratio: 0.68); sides convex, widest near middle of length; humeri raised; apex jointly rounded; striae with punctures as wide as or slightly narrower than interstriae; interstriae slightly convex; scutellar shield rounded, black, glabrous.</p><p>ABDOMEN. Underside covered with minute recumbent whitish setae, not contiguous.</p><p>LEGS. Profemora thickened near middle of length; protibiae with external margin straight, internal slightly bisinuate; claws simple.</p><p>TERMINALIA. Body of penis elongate (W:L ratio: 0.37), 1.2× as long as apodemes; sides subparallel in dorsal view, widest at base, converging regularly apicad from apical ¼ of length, apex forming spatula; in lateral view curvature stronger in basal ½ of length, width narrowing regularly from middle of length to apex; apex curved upward (Fig. 3D).</p><p><b>Sexual dimorphism</b></p><p>Females can be distinguished from males by the rostrum which is slightly longer and more downcurved in lateral view (Fig. 3C).</p><p><b>Life history</b></p><p>Adults were recorded on various species <i>Vachellia</i> (Fabaceae). The holotype was collected in the vicinity of blooming <i>Vachellia karroo</i> (Hayne) Banfi & Galasso. Adults were collected from October to February, they are attracted by light traps.</p><p><b>Distribution</b></p><p>Endemic to the Republic of South Africa, where it seems to be restricted to the Eastern and Western Cape provinces. Its putative host plant is widely distributed in Southern Africa.</p><p><b>Remarks</b></p><p>The stridulatory plate of the unique male specimen available was damaged and could not be used in the description.</p>