Urodeta longa Sruoga & Kaila, 2019

Urodeta longa Sruoga & Kaila, 2019 View in CoL

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4

Material examined.

Thailand • 1 ♀ (holotype); Lampang, Muban Phichai ; 4 Mar. 2017; gen. prep. VS 1 / 29.03. 19; http://id/luomus.fi/KR.36156 [barcode unsuccessful] • 1 ♂; Lampang, Chae Hom ; 18 ° 43.488 ' N, 99 ° 40.614 ' E; 02 Mar. 2019; gen. prep. VS 603 GoogleMaps • 1 ♂; Thailand, Lampang, Chae Hom ; 340 m a. s. l.; 18 ° 43.3166 ' N, 99 ° 33.1833 ' E; 10 Dec. 2020; http://id/luomus.fi/F.469302 GoogleMaps ; • 1 ♀; Thailand, Lampang, Muban Phichai ; 240 m a. s. l.; 18 ° 18.25 ' N, 99 ° 31.1 ' E; 17 Feb. 2020; http://id/luomus.fi/F.470851; gen. prep. VS 611 GoogleMaps • 1 ♂; same locality; 19 Feb. 2020; http://id/luomus.fi/F.470853; gen. prep. VS 610 GoogleMaps • 2 ♂; same locality; 20 Feb. 2020; http://id/luomus.fi/F.470854; gen. prep. VS 638; http://id/luomus.fi/F.470855; gen. prep. VS 613 GoogleMaps • 1 ♀; same locality; 23 Feb. 2020; http://id/luomus.fi/F.470856 GoogleMaps • 1 ♂; same locality; 06 Jan. 2021; http://id/luomus.fi/F.469303; gen. prep. VS 612 GoogleMaps • 2 ♂; same locality; 03 Mar. 2021; http://id/luomus.fi/F.469307; gen. prep. VS 639; http://id/luomus.fi/F.469300; gen. prep. VS 604 GoogleMaps • 2 ♀; same locality; 06 Mar. 2021; http://id/luomus.fi/F.469305; gen. prep. VS 614; http://id/luomus.fi/F.469306; M. J. Pellinen leg.; MZH GoogleMaps .

Diagnosis.

Urodeta longa is mostly similar to U. jurateae with both having a valva not divided into two separate lobes, a strongly sclerotization in the caudal part of the female genitalia, and the absence of signa. The main differences between U. longa and U. jurateae are: (1) the spine where sacculus meets cucullus is longer than its width at the base in U. longa , whereas in U. jurateae it is shorter than its width at the base; (2) the phallus in U. longa is without dorsal carina, in U. jurateae phallus is with paired palmate dorsal carina; (3) the antrum in U. longa is strongly sclerotized, with about 21–27 large and several small internal spines and dorsal wall without sclerotized plate, whereas in U. jurateae the antrum is membranous, with minute internal spines and the dorsal wall with large strongly sclerotized paired plate.

Description of male.

Forewing length 2.5–3.4 mm; wingspan 5.5–7.2 mm (n = 8). Head: frons, vertex, and neck tuft white, weakly mottled with light brown tipped scales; labial palpus straight, 0.5 as long as the width of head, white, with very weak admixture of pale brown; antenna 0.8 as long as length of forewing, scape white, mottled with light brown tipped scales, pecten white; flagellum brownish grey, weakly annulated with paler rings in basal part, flagellomeres bowl-shaped, unusually wide, especially in central part of flagellum. Thorax and tegula strongly mottled with scales basally white and distally greyish brown; forewing strongly mottled with scales basally white and distally from creamy brown to greyish brown; black, brown-tipped scales forming two small, blurred spots transversally arranged just before middle of wing, another small black-brown spot on fold at 1 / 4 from base of wing; fringe scales creamy white with some blackish brown tipped scales. Hindwing brownish grey, its fringe scales somewhat paler.

Male genitalia. Tegumen weakly sclerotized, lateral margin strongly folded inwards. Uncus approximately 0.5 × as long as tegumen, posterior margin membranous, without paired lobes. Basal arms of gnathos narrow, basally strongly sclerotized and membranous distally, spinose knob of gnathos as large as length of uncus, slightly ovate, spines anteriorly directed. Valva short and broad; costa somewhat wrinkled, weakly sclerotized, covered with several short setae, distally with sharp curved tip; sacculus convex, distally with sharp, claw-shaped process before terminal emargination; cucullus narrow and elongate, apex with small upcurved spine; inner processes of valva fused apically, with a few thin setae, forming weakly sclerotized transtilla. Ventral shield of the juxta about 2 × as long as wide with strongly sclerotized median ridge; lateral membranous extension of the juxta apically bilobed, with few short setae, partly surrounds the phallus; juxta lobes approximately 4 / 5 as long as of ventral shield of juxta, distally tapered, with a few tiny setae. Vinculum U-shaped, narrow. Phallus apically fused to the juxta, longer than valva, slightly dilated in the proximal part, gradually tapered towards pointed apex, which is s-shaped in lateral view; insertion of ductus ejaculatorius dorso-laterally directed; caecum small; vesica with 6 or 7 large, straight cornuti, 4–6 smaller, bent ones in a cluster and about 10–15 small cornuti of varying size.

Biology.

The host plant and early stages are unknown. Adults fly from mid-December until early March.

Distribution.

Known only from northern Thailand.

Barcode information.

Nine specimens of U. longa were successfully barcoded. Intraspecific variation was 1.69 %, branch length / distance to closest intra-generic match, U. hibernella (with the synonymic name U. cisticolella ( LNAUW 3357-18), was 13.08 %. See Discussion below.