Dragmatucha goniotes Park, 2020

Park, Kyu-Tek, Koo, Jun-Mo, Agassiz, David J. L. & Aarvik, Leif, 2020, A taxonomic review of the Afrotropical genus Dragmatucha Meyrick, 1908 (Lepidoptera, Gelechioidea, Lecithoceridae, Torodorinae), with descriptions of eleven new species, Zootaxa 4786 (2), pp. 151-175 : 160-163

2. Dragmatucha goniotes Park , sp. nov.

( Figs 7 A–H)

Type material. Holotype: male, DR Congo, Musée Du Congo, Eala , vii 1936, leg. J. Ghesquière; gen. slide no. CIS-7187 . Paratype: 2♂, same data as holotype; gen. slide no. CIS-7188, in RMCA .

Diagnosis. The new species is superficially similar to the following new species, D. cochliana Park , sp. nov., but it can be distinguished from the latter by the smaller size (via. 18.5 mm in D. cochliana Park sp. nov.) and the male genitalia with the basal plate of gnathos triangularly developed, the cucullus shorter with nearly straight or slightly convex outer margin, and juxta less concave on caudal margin.

Description. Male ( Fig. 7A ). Wingspan 16.0 mm. Head: Creamy white anteriorly and yellowish brown posteriorly. Antenna slightly longer than forewing; basal segment elongated, yellowish white dorsally, dark brown on anterior and posterior surface flagellum yellowish white throughout, slightly dilated apically. Second palpomere of labial palpus thickened, long, about twice the width of compound eye, arched, pale yellowish brown on outer surface; yellowish white at apex; 3 rd palpomere slender, strongly upturned, shorter than 2 nd palpomere, yellowish brown. Thorax: Tegula and thorax mixed with yellowish white and yellowish brown scales. Hind tibia yellowish white, with yellowish brown, rough scales medially. Forewing with broad, dark brown sub-basal area occupying about basal 1/4; antemedian band broad, nearly parallel-sided, yellowish white, slightly broadened anteriorly and posteriorly; postmedian band narrow, yellowish white, zigzagged bellow CuA1; costa slightly arched beyond 3/4, then slightly oblique; apex obtuse; termen oblique; fringe creamy white, with narrow yellowish brown median band. Hind wing ground color yellowish brown; postmedian line well-developed, strongly angled medially; fringe creamy white, with narrow, yellowish-brown median band. Abdomen ( Fig. 7H ): Spinous zones present on dorsal surface; segment VIII simple.

Male genitalia ( Figs 7 C–G): Uncus slender, heavily sclerotized, nearly parallel-sided, slightly bent medially, exceeding apex of basal plate of gnathos. Basal plate of gnathos triangularly produced apically; median process rather slender, strongly bent from middle, with sharply pointed apex. Tegumen weakly sclerotized, rather short, with deeply concave anterior margin. Valva broad basally, narrowed toward cucullus; costa slightly expanded anteriorly, near base, then slightly oblique; ventral margin convex medially; sacculus weakly sclerotized, broad at base, gradually narrowed, extending to lower corner of cucullus; cucullus strongly curved inwardly beyond 2/3, densely setose; with deeply concave inner margin and nearly straight or slightly convex outer margin. Juxta with triangular caudal lobes laterally; median lobe and central ridge poorly developed. Aedeagus stout, as long as valva, bent at basal 1/3; dorsal surface terminated with semi-ovate protrusion, upturned; cornuti consist of a sole-like plate with conic spines along anterior margin and a large patch bearing numerous spinules.

Female unknown.

Distribution. DR Congo (Eala).

Etymology. This species is derived from the Greek, gonio (= an angle) with a Greek suffix, - tes, referring to the strongly angled postmedian line in the hind wing.

Figures

FIGURE 7. Dragmatucha goniotes Park, sp. nov.: A, adult, holotype; B, label; C, male genitalia, holotype, gen. slide no. CIS- 7187; D, ditto, aedeagus; E, lateral view of uncus+gnathos; F, male genitalia of a paratype, gen. slide no. CIS-7188; G, ditto, aedeagus, with close-up apical part; H, abdomen with spinous zones.