Ukamenia thailandica, Muadsub & Pinkaew, 2020

Muadsub, Sopita & Pinkaew, Nantasak, 2020, Ukamenia Oku, 1981 (Lepidoptera: Tortricidae: Olethreutinae), new record for Thailand with descriptions of a new species, Zootaxa 4881 (1), pp. 83-90 : 84-87

Ukamenia thailandica n. sp.

urn:lsid:zoobank.org:pub:E7296FA6-BF7A-4BC8-BDE3-F600A38F4135

( Figs. 1 , 3 , 5–18 )

Type. Holotype ♂. THAILAND: Chaiyaphum Prov.: Phu Khieo W.S., 16 o 23ʹ13ʺN 101 o 35ʹ10ʺE, ca 880 m, 11 Dec 2018, N. Pinkaew; specimen no. np12599 (genitalia slide NP3904), deposited in KKIC . Paratype 1♂. THAILAND: Chaiyaphum Prov.: Phu Khieo W.S., 16 o 23ʹ13ʺN 101 o 35ʹ10ʺE, ca 880 m, 11 Dec 2018, N. Pinkaew; specimen no. np12600 (genitalia slide NP3905), deposited in KKIC .

Diagnosis. This species is most similar to Ukamenia sapporensis ( Matsumura, 1931) but male genitalia of U. thailandica n. sp. differs by a pair of subelliptical pouch on abdominal sternum III (subcircular in U. sapporensis ), sacculus projecting lobe shorter than mid length of valva (longer than mid length of valva in U. sapporensis ), and subcone-shaped phallus (subcylindrical in U. sapporensis ).

Description. Head ( Fig. 5 ): Lower frons light brown, upper frons light brown with dark brown laterally; vertex brown with brownish white tips; labial palpus porrect, first segment yellowish white, second segment with basal half narrow, yellowish white with a dark brown spot medially, apical half enlarged, light brown with a dark brown patch medially, apical segment small, greyish brown with white apex. Antenna light brown.

Thorax: Pronotal collar brown; tegulae brown with basal 1/3 dark brown; mesonotum with anterior half brown, posterior half light brown, posterior crest brown with yellowish orange tips. Hind tibia enlarged with modified scales, outer surface covered with short appressed grey scales, inner surface shallow concavity covered with short, dark brown scales, basal half of concavity filled with tuft of very dense yellowish white hair pencils and top with elongate light brown scales ( Figs. 8–10 ). Forewing broad subrectangular, length 5.9–6.1 mm in males (n = 2) ( Fig. 3 ), costa evenly curve; termen and wing apex rather round; costal strigulae well developed, pinkish red separated by blackish streaks; ground color light greyish brown mixed with scattered silvery spots and patches, costa with distinct pinkish red scales, slightly paler to wing apex and diffuse along termen, basal 1/5 with indistinct patch, brown to dark brown, with a moderately large silvery patch dorsobasally and small silvery spots scattered to dorsum, beyond with irregular transverse band, brown mixed with silvery patches, near margins with irregular, transverse narrow lines extending from costa to dorsum, dark brown, medially with large, irregular patch extending obliquely from middle of costa to near tornus, brown to dark brown mixed with silvery patches, outer margin edged with irregular transverse narrow line, dark brown, extending from base of R 5 to tornus, apical 1/4 with a silvery oblique patch extending from near costa at R 2 to between R 5 and M 1, continued with an irregular patch, dark brown, extending obliquely to near termen at M 3, above with a small silvery patch near termen between R 5 and M 2, tornal area with a large, transverse silvery patch extending obliquely from near base of M 1 to termen between CuA 2 and CuP, wing apex with moderately subcircular patch, dark brown mixed with silvery scales, anal margin slight curve upwardly; fringe scales brown mixed with dark brown; underside light greyish brown, with yellowish white marks along costa. Hindwing ( Fig. 3 ) subtriangular, light brown, anal margin with fringe scales curve upwardly, underside light brown, slightly paler to apex, lower surface covered with diffuse curved up narrow scales between Sc+R 1 to 3A ( Figs. 6–7 ).

Abdomen. Tergum II with two small, crescentic pits on anterolateral corners ( Fig. 17 ), sternum III anteromedially with a pair of large, subelliptic pouch contain dense scale sockets ( Fig. 18 ), sternum VIII enlarged, forming a large subtriangular lobe, posterior margin with two small, pointed subtriangular lobes, tergum VIII enlarged, forming a large subtriangular lobe, dome-shaped ( Fig. 16 ). Male genitalia ( Figs. 11–15 ). Uncus absent; tegumen widened mid length, divided into two parts, upper half tapered to two rounded bilobed apex, lower half narrow to base, apical 1/4 of tegumen with roughly surface, with moderately dense setae; socii small, triangular, densely setose, arising at apical 1/4 of tegumen, pointing inwardly ( Fig. 12 ); gnathos large, forming subpentagon, weakly sclerotized, arising from mid length of tegumen, lateroapical margins with two sclerotized arms, slant inwardly, becoming closer near blunted apices that bent outwardly, with sclerotized plus mark medially ( Fig. 12 ); vinculum large, moderately sclerotized; juxta subtriangular; caulis moderately long; phallus moderately long, cone-shaped, slightly curve medi- ally, basal half widened, abruptly narrow to mid length of phallus, then slightly tapered to pointed apex; valva large, costa process forming large, bean-shaped, protruding inwardly, with sparsely minute spines ventrally ( Fig. 13 ); sacculus rather small, subquadrate, near apicoventral corner with moderately long, subcylindrical projecting lobe, pointed apex, pointing outwardly, sparsely setose ( Fig. 15 ); cucullus large, elongate subelliptic, upper margin folded longitudinally, upper part with moderately dense, short mixed with long setae, ventral part sclerotized, smooth, apex of cucullus with a tuft of dense, long setae and one large strong spine, beneath with a row of strongly spines, varies in number (9 spines in holotype ( Fig. 14 ) and 10 spines in paratype), length of these spines reduced orderly to apex.

Etymology. This species is named to Thailand, type locality.

Figures

FIGURES 1–2. Living specimens in natural resting posture. 1. Ukamenia thailandica n. sp. 2. Gatesclarkeana idia.

FIGURES 3–4. Adult specimens (scale bars = 2 mm). 3. Ukamenia thailandica n. sp. (holotype) 4. Gatesclarkeana idia.

FIGURES 5–7. Head and hindwing of Ukamenia thailandica n. sp. (holotype). 5. Composition of head. 6.Underside of hindwing. 7. Curved up scales on the underside of hindwing.

FIGURES 8–10. Hind tibia of Ukamenia thailandica n. sp. (holotype, left side). 8. Outer side. 9. Inner side. 10. Tuft of yellowish white hair pencils inside concavity.

FIGURES 11–15. Male genitalia of Ukamenia thailandica n. sp. (holotype). 11. Male genital capsule with ex-situ aedeagus. 12. Tegumen, socii, and gnathos. 13. Costal process (right side). 14. Tuft of strongly setose with one strongly spine and a row of strongly 9 spines on terminal of left cucullus. 15. Subcylindrical projecting lobe on right sacculus.

FIGURES 16–18. Distinct characters on the abdomen of Ukamenia thailandica n. sp. (holotype). 16. Overall image of abdomen. 17. Small pits on tergum II. 18. Subcylindrical pouches on sternum III.