Fibuloides tratensis Jaikla and Pinkaew

Jaikla, Soraya, Pinkaew, Nantasak, Vitheepradit, Akekawat & Klangsap, Nathawat, 2013, Two new species of Fibuloides (Lepidoptera: Tortricidae) from eastern Thailand, Zootaxa 3664 (1), pp. 85-91 : 86-89

Fibuloides tratensis Jaikla and Pinkaew , n. sp.

( Figs. 1 A–B, 2, 3A, 4A)

Diagnosis. The shape and position of the labial palpi in the male are most similar to those of F. phycitipalpia Horak , they arise vertically and are appressed to the frons. However, the labial palpi of F. t r a t e n s i s are much shorter and broader and the inner surface of the second segment is only sparsely covered with scales; in contrast, the labial palpi of F. phycitipalpia are longer and more slender. The long, slender, modified scales on distal end of the second segment of the labial palpi and lower frons in the male of F. t r a te ns i s are unique within Olethreutinae and easily distinguished this species from all congeners. The phallus of F. t r a t e n s i s is most similar to those of F. neaera (Meyrick) and F. geniculata Pinkaew and Zhang. However, F. t r a t e n s i s differs from F. n e a e r a and F. geniculata in forewing pattern and in the presence of three large flattened spiniform setae from the outer surface of the valva; in the latter species there are many more large flattened spiniform setae.

Description. Head: Vertex light brown to brown mixed with dark brown laterally; upper frons light brown mixed with brown, lower frons light brown, male with vertical ridge medially, covered with short, appressed scales mixed with dense, long, slender yellowish white scales, pointing outward ( Fig. 2 C); labial palpus in male appressed to the frons and rising upwardly (natural position) ( Fig. 2 A), with first segment dark brown, second segment light brown with three, dark brown, transverse bands (at base, middle and apex), with inner surface bearing shallow excavation at 2/3 length and covered with dense, appressed, light brown scales, tip with group of moderately dense, long, narrow, light brown scales, apical segment narrow, orange white ( Fig. 2 D); female with labial palpus long and porrect, first segment dark brown, second segment triangular, distally greatly widened, light brown with three, dark brown, transverse bands (at base, middle and apex), apical segment short, dark brown ( Fig. 2 B); male antenna with notch at the first segment of flagellum.

Thorax: Pronotal collar brown mixed with dark brown; mesothorax with tegula light brown mixed with brown; mesonotum light brown to brown with irregular, transverse band medially, with orange white scales on posterior 1/4. Forewing ( Figs. 1 A–B) length 3.8–4.2 mm in males (n=8), 4.3–4.5 mm in females (n=2); male costal fold absent; termen slightly concave below apex, between R5 and M1; ground color light brown; costal strigula 1 indistinct, strigulae 2–4 and 7–9 paired, strigulae 5 and 6 single, pale orange white, paired strigulae separated by dark brown spots, termen with strigula 10 forming pale yellow spot between R5 and M1; basal fascia indistinct, brown mixed with dark brown; subbasal fascia present as small subtriangular spot on costa and extending as irregular transverse narrow band to inner margin, brown mixed with dark brown; median fascia fused with postmedian fascia, forming distinct subtriangular patch on costa, dark brown, extending from costa to midwing; preterminal fascia present as short and oblique band, brown, extending outward from costa to R5 near outer margin, wing apex brown mixed with dark brown, strigulae 5, 6 and 7 with oblique silvery striae, confluent at R3 and extending from R3 to dorsum near tornus, strigula 8 with oblique silvery stria extending to R4, strigula 9 with short, transverse silvery stria extending to R5, a narrow, oblique brown band between strigulae 7 and 8 extending to R5, ocellar region with irregular, transverse narrow line, dark brown, extending from R5 to tornus and silvery stria beyond extending from M1 to between CuA1 and CuA2, outer margin with narrow line, brown, extending from between R5 and M1 to CuA1. Underside greyish brown, strigulae on costa and termen yellowish grey. Hindwing brown dorsally, greyish brown ventrally, except basal 2/3 of both sides covered with dark brown, narrow scales.

Abdomen: Male genitalia ( Fig. 3 A) with tegumen widest in middle, dorsally with pronounced shoulders. Uncus distally bipartite, dilated medially, apices round, bent, spatulate. Socii subtriangular, moderately large, sparsely setose. Gnathos arising from mid-length of tegumen, moderately sclerotized, with two parallel, dorsally rising bands. Valva long and slender with moderately large basal excavation, small subtriangular lobe on ventral margin near middle of valva, with a cluster of spiniform setae and three flattened, widened spiniform setae arising from outer surface, neck very slender, inner surface with patch of dense setae at base of cucullus; cucullus small, transversely extended, peanut-shaped, dorsal portion small and narrow, apex rounded, moderately setose, ventral portion widened, tip round, with dense spiniform setae; juxta triangular; anellus closely surrounding base of phallus, cuplike, dorsally with plate extending to mid-length of phallus; phallus long, bent upward at right angle in middle, with seven, non-deciduous cornuti. Female genitalia ( Fig. 4 A) with sternum VII with large sclerotized plate, with deep, U-shaped medial emargination in posterior margin; densely scaled except on posterior 1/4, medially with curved patch of dense, small sclerotized ridges and microtrichia. Tergum VIII with dense microtrichia on anterior half, lateral triangular extensions sparsely setose, anterior 1/3 with dense microtrichia, scales absent. Papillae anales with dense setae; apophyses short and stout, anteriores slightly longer than posteriores; ostium bursae opening into a wide shallow cup fused with emargination of S7; lamella postvaginalis forming a transverse band with a well-sclerotized posterior margin in middle, spinulose, more densely scaled lateroposteriorly, anteromedially without scales and microtrichia, with patch of dense microtrichia extending on membrane laterally beyond lamella postvaginalis; ductus bursae rather short, widened towards corpus bursae; colliculum moderately large, sclerotized, not encircling ductus bursae, followed by a short membranous portion with large sclerotized, bi-pronged plate narrowly encircling ductus bursae near middle and the two pointed prongs extending into bursae; ductus seminalis arising from anterior 1/3 of ductus bursae; corpus bursae spinulose, except around the two slender blade-like signa.

Holotype. 3. Thailand: Trat Prov.: Trat Agroforestry R. St., 12 ˚ 23'43"N 102 ˚ 40'32"E, ca. 30 m, 18–19 Aug 2012, N. Pinkaew; np 5334; KKIC slide no. NP 1545. Deposited in BMNH.

Paratypes. Thailand: Trat Prov.: Trat Agroforestry R. St., 12 ˚ 23'43"N 102 ˚ 40'32"E, ca. 30 m, 19–20 Oct 2011 (1Ƥ) (np 4849; KKIC genitalia slide NP 1549); 19–20 Oct 2011 (13), (np 4832; KKIC genitalia slide NP 1541), deposited in TNHM; 24–25 Dec 2011 (13) (np 5154; KKIC genitalia slide NP 1542); 21–23 Apr 2012 (1Ƥ) (np 5017; KKIC genitalia slide NP 1546); 17–18 Feb 2012 (33) (np 4959; KKIC genitalia slide NP 1538, np 4975 KKIC genitalia slide NP 1539, np 4970; KKIC genitalia slide NP 1543); 16–18 Jun 2012 (23) (np 5118; KKIC genitalia slide NP 1540, np 5075; KKIC genitalia slide NP 1537), all N. Pinkaew. Deposited in KKIC.

Distribution. Thailand (Trat).

Etymology. The species name refers to the type locality of Trat province.

Figures

FIGURE 1. Adults of Fibuloides spp. (scale bars = 2 mm). A. F. t r a t e n s i s Jaikla and Pinkaew, n. sp. (holotype, male). B. F. tratensis Jaikla and Pinkaew, n. sp. (paratype, female). C. F. bulla Jaikla and Pinkaew, n. sp. (holotype, male). D. F. bulla Jaikla and Pinkaew, n. sp. (paratype, female).

FIGURE 2. Head of F. tratensis Jaikla and Pinkaew, n. sp. A. Labial palpi of male in natural position (paratype). B. Labial palpi of female in natural position (paratype). C. Lower frons with long, narrow scales (holotype, male). D. Inner surface of labial palpi (second segment) showing group of raised scales apically (holotype, male).

FIGURE 3. Male genitalia of Fibuloides spp. A. F. t r a t e n s i s Jaikla and Pinkaew, n. sp. (KKIC slide no. NP 1545). B. F. bulla Jaikla and Pinkaew, n. sp. (KKIC slide no. NP 1547).

FIGURE 4. Female genitalia of Fibuloides spp. A. F. t r a t e n s i s Jaikla and Pinkaew, n. sp. (KKIC slide no. 1546). B. F. bulla Jaikla and Pinkaew, n. sp. (KKIC slide no. 1548).