Fibuloides bacriora Siraphattarathamrong and Pinkaew, 2019

Siraphattarathamrong, Paphatpron, Muadsub, Sopita & Pinkaew, Nantasak, 2019, Descriptions of two new species of Fibuloides Kuznetsov, 1997 (Lepidoptera: Tortricidae: Eucosmini) from Thailand, Zootaxa 4590 (4), pp. 495-500 : 496-498

Fibuloides bacriora Siraphattarathamrong and Pinkaew , n. sp.

( Figs. 1 , 3–4 , 7 –9,13–15)

Diagnosis. This species is most similar to Fibuloides macrosaris in forewing pattern, but F. bacriora has a narrower forewing with more green in the ground color. The male genitalia of F. bacriora have a distinctly membranous socii and a large sclerotized plate of the gnathos that differs from all other species of Fibuloides .

Description. Head ( Fig. 1 ): Upper frons light brown mixed with dark brown, lower frons yellowish white; labial palpus with first segment white to yellowish white, second segment dilated apically, light brown, ventral margin with white stripe, with distinct yellowish mark dorsoapically, apically dark brown, apical segment short, white, inner face of palpus white; vertex light brown mixed with brown; antenna brown with notch at base of flagellum.

Thorax: Pronotal collar dark brown; tegula and mesonotum brown mixed with greyish green. Forewing ( Figs. 3–4 ) length 4.1–4.2 mm in male (n = 2), 3.7–3.8 mm in female (n = 3); rectangular, costa slightly curved, termen concave below apex, costal fold absent; ground color greenish white, slightly darker apically, diffusely mottled with brown; costal strigulae white separated by blackish streak, well developed along costa in female, male with distinct costal strigulae in apical half, basal half indistinct with dark brown stripe along costa from near wing base to middle of costa, basal 1/3 with indistinct transverse brown band extending outward from costa to Cu then backward to dorsum, middle of costa with large dark brown trapezoidal mark, beyond with two oblique greenish grey stripes, one extending from costa to R 3 and R 4, other extending to R 5 near termen, with greenish white stripe along termen from below apex to CuA 1, with narrow blackish line near termen extending from R 5 to between M 1 and M 2; underside light brown except dorsal half dark brown, with grey spots along costa apically. Hindwing light brown, basal 2/3 more hyaline, covered with moderately dense scales, slightly paler near wing base; underside light brown.

Abdomen: Male genitalia ( Figs. 7 ¯9) with tegumen moderately sclerotized, with group of dense scales basally, with sclerotized shoulders; uncus rather short, bifid, with blunt apices, inner margin sparsely setose, medially with protruding process, bilobed, rounded apices pointing ventrally; socii membranous with moderately dense setae; gnathos arising from basal 2/3 of tegumen, joined medially, forming a large, moderately sclerotized plate, extending upward, connected to tegumen shoulder, with two divergent sclerotized ridges; juxta subtriangular; caulis short; anellus surrounding base of phallus; phallus moderately long, with dense cornuti; valva with long, sparsely setose on dorsal margin medially; sacculus with moderately dense setae basally, ventrolateral area with narrow patch of dense, short setae, outer surface with a series of dense, long, spiniform setae, bidentate apices, neck narrow and curve; cucullus scoop-shaped, bent at base, with rounded apex pointing ventrally, with dense patch of long and short spines, dorsal margin with sparse short setae. Female genitalia ( Figs. 13–15 ) with papillae anales densely setose. Tergum VIII without scales, lateral triangular extension with moderately dense scale sockets and sparse setae. Sternum VII moderately sclerotized, posterior margin moderately excavation, medially fused with widened lamella postvaginalis, densely microtrichiate, posterolaterally with dense scales sockets, anterolaterally with patch of densely microtrichiate; ostium bursae located on sternum VII close to anterior margin, sterigma fused with sternum VII forming incomplete subtrapeziodal ridge, beyond laterally on each side with long, sclerotized, oblique ridge; ductus bursae shorter than corpus bursae; colliculum two small, lateral sclerotized below ostium; anterior half with a sclerotized plate, prong-shaped with arm tapering and tip reaching beyond bursae neck; ductus seminalis arising at base of prong; corpus bursae ovate with two unequal horn-shape signa.

Holotype. ♂. Thailand, Nakhon Nayok; Khao Yai N.P., Pha Deaw Dai, 14°21′56″N, 101°24′24″E, ca. 1,140 m, Hill Evergreen forest , 5 July 2016, N. Pinkaew et al., np 8995; genitalia slide no. NP 3077. Deposited in KKIC.

Paratypes.: 1♂, 3♀, Thailand: Nakhon Nayok, Khao Yai N.P., Pha Deaw Dai, 14°21′56″N, 101°24′24″E, ca. 1,140 m, Hill Evergreen forest , 5 July 2016, N. Pinkaew et al., np 9005 , ♂ genitalia slide NP 3184. Nakhon Nayok, Khao Yai N.P., 14°25′55″N, 101°24′05″E, ca. 700 m, 7 July 2016, np 8906 , ♀ genitalia slide NP 3083. Chiangmai, Doi Suthep-Pui N.P., 18°48′41″ N, 98°53′03″ E, ca. 1,264 m, 5 September 2013, np 5959 , ♀ genitalia slide NP 2082. Kanchanaburi, Thong Pha Phum N.P., 14°41′27″ N, 98°27′29″ E, ca. 730 m, 10 July 2002, np 743 , ♀ genitalia slide NP 526. All deposited in KKIC .

Distribution. Thailand (Nakhon Nayok, Chiangmai, Kanchanaburi).

Etymology. The specific name is derived from Lain bacrio (= long handle, dipper, ladle), referring to the shape of the cucullus.

Figures

FIGURES 1–2. Head of Fibuloides spp. 1. F. bacriora (holotype male). 2. F. falcatus (holotype male).

FIGURES 3–6. Adults of Fibuloides spp. (scale bars = 2 mm.) 3. F. bacriora (holotype male). 4. F. bacriora (paratype female). 5. F. falcatus (holotype male). 6. F. falcatus, sex scales on the underside of anal margin of hindwing.

FIGURES 7–9. Morphological features of male genitalia of Fibuloides bacriora (holotype). 7. Male genital capsule 8. Extension of uncus and membranous socii (arrow) 9. phallus.

FIGURES 13–15. Morphological features of female genitalia of Fibuoides bacriora (paratype). 13. Female genital capsule. 14. Ostium and sterigma. 15. Signa.