Udea namaquana Karisch & Mally, 2022

Mally, Richard, Aarvik, Leif, Karisch, Timm, Lees, David C. & Malm, Tobias, 2022, Revision of Afrotropical Udea Guenee in Duponchel, 1845, with description of five new species of the U. ferrugalis (Huebner, 1796) group (Lepidoptera, Crambidae, Spilomelinae), Nota Lepidopterologica 45, pp. 315-353 : 315

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Udea namaquana Karisch & Mally

sp. nov.

Udea namaquana Karisch & Mally sp. nov.

Figs 8 View Figures 6–10 , 18 View Figures 11–20 , 27 View Figure 27 , 31 View Figures 28–32

Type locality.

South Africa, Northern Cape, Namaqua district, Hondeklipbaai, 30°21'S, 17°23'E.

Material examined.

Holotype: South Africa • 1 ♂; Namaqualand , Hondeklipbaai, 8 km OSO Ort [ESE of village]; 30°21'S, 17°23'E; 05 Nov. 1993; T. Karisch leg.; Strauchvegetation [scrub vegetation], light catch with 160 W ML; Karisch genitalia dissection no. 3955; unique specimen identifier DEI Lepidoptera , # 300009; SDEI GoogleMaps . • Paratypes: 1 ♀; same data as for holotype; Karisch genitalia dissection no. 3957; unique specimen identifier DEI Lepidoptera , # 300010; SDEI GoogleMaps 1 ♂; Namaqualand , Vanrhynsdorp, 7.5 km südöstl. Ort [SE of village], nördl. der Matsikammaberge [north of the Matzikama mountains]; 31°39'S, 18°47'E; 02 Nov. 1993; T. Karisch leg.; light catch with 160 W ML; MNVD GoogleMaps .


Similar to U. ferrugalis (Fig. 2 View Figures 1–5 ), but forewings more triangular, apex not as acute, ground colour more whitish, pattern distinct, grey marginal fascia of hindwing very faint or absent. In male genitalia the sacculus of U. namaquana (Fig. 27 View Figure 27 ) is broader, the cucullus more triangular with an oblique tip, the juxta not bifurcate and without the numerous teeth on the projections, and the phallus a bit slenderer and more curved apically. The female of U. namaquana (Fig. 31 View Figures 28–32 ) has a shorter but broader sterigma and a much narrower dentate signum ridge than in U. ferrugalis (Fig. 29 View Figures 28–32 ).

Description of adults.

Head: pale yellow, intermixed with yellowish-brown; labial palps about three times as long as eyes, 2nd segment broad covered with scales, ventral whitish, dorsal and lateral yellowish-brown, in female tip of scales brown whitish; maxillary palps ochre, slightly tinted grey, long enough to touch each other at apex; haustellum fully developed, basally with ivory-coloured scales; antenna filiform, shortly ciliate, flagellum yellowish-ochreous in male, at basal segments with some brown scales, yellowish in female. Thorax: pale yellowish, scales with a brown tip. Tibia of fore- and midlegs yellowish, tinged with brown, and yellowish on hindlegs. Outer tibial spur of midleg about 1/3 as long as inner, proximal spurs of hindleg with outer spur minute, about 1/10 as long as inner, distal spurs with outer spur about 2/3 as long as inner. Wings: (Fig. 8 View Figures 6–10 ) Forewing length of males 8.5-9 mm, of female 9.5 mm. Forewings of pale-yellow ground colour, in male intermixed with brown. Antemedian line brown, indistinct from middle to dorsum in male, in female sharply angled. Proximal discoidal stigmata ellipsoid, distal discoidal stigmata narrow, lower part partly filled with brown scales. Postmedian line fine, greyish brown, slightly dentate, convex curved from costa to CuA1, with an abrupt dent inward at CuA2, but at this point only inner margin is visible, then continuing slightly dentate towards dorsum. Distal area along postmedian line and along margin less brown tinged in male. Black dots at veins on margin of the wings. Fringes yellowish white, some with brown tips. Underside whitish, pale yellow at costa, discoidal stigmata and postmedian line grey, the latter blackish at costa, between postmedian line and apex three minute black dots at costa. Hindwing yellowish white, very slightly grey in apex. Discoidal spot faint, grey. Postmedian line grey, but very faint and only indicated at apex. Black dots at the margin of the wings at the veins. Fringes whitish, some with brown tips. Underside whitish, at costa more yellowish, inner and outer discoidal spot blackish or dark grey, postmedian line faint, grey, but starting with a blackish dot at costa. Marginal area at apex slightly greyish-brown. Abdomen: Pale yellowish. Tympanal organs (Fig. 18 View Figures 11–20 ) with lobulus well developed, rounded to somewhat triangular, about as long as broad. Male genitalia: (Fig. 27 View Figure 27 ) Uncus tip rounded, covered with stronger bristles, neck slender, broadened towards tegumen, with bulbous thickening at basis; tegumen roughly rectangular; Transtilla arms triangular, with long, tapered proximal ends; vinculum V-shaped, saccus quite broad, v-shaped; juxta large, plate-like, basal rounded, margin anterio-lateral stronger sclerotized and covered with some small teeth, upper margin frayed. Valva long, slender, cucullus (valva apex) gradually tapered, costa concave; fibula strong, with broad basis, bent at tip; sacculus broadest at middle. Phallus slender, slightly curved at distal ¼, with a strong cornutus, thimble-shaped at its tip, basis long; at tip of uneverted vesica a dense group of numerous small spines. Female genitalia: (Fig. 31 View Figures 28–32 ) Papillae anales densely studded with long chaetae; apophyses posteriores thin, basally slightly bent, about half as long as apophyses anteriores; apophyses anteriores thin, more or less straight; antrum large, with a broad posterior opening tapering towards offset trapezoid anterior antrum section; colliculum slender, almost twice as long as broad, strongly sclerotised, with a broad longitudinal unsclerotised strip on ventral side; ductus bursae short, membranous, posteriorly with a small lateral protrusion; ductus seminalis small, membranous, attached at posteriormost ductus bursae, adjacent to colliculum; corpus bursae large, ovoid, membranous, partly with granulose surface structure; long lanceolate signum with numerous small teeth stretching through entire corpus bursae.


So far only known from the Namaqualand in Western South Africa.


This species is named after Namaqualand, an arid region in Namibia and South Africa, and the origin of the type material.

Genetic data.

Not available.













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