Fibuloides bulla 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 : 89-91

Fibuloides bulla Jaikla and Pinkaew , n. sp.

( Figs. 1 C–D, 3B, 4B)

Diagnosis. This species is most similar to F. t r a t e n s i s in forewing pattern, but the two species differ the male and female genitalia. The frons and labial palpi of the male of F. bulla lack modified scales characteristic of F. tratensis . F. b u l l a is distinguished by a dense cluster of long, parallel spiniform setae on the ventral part of the cucullus, which is unique and easily separates it from all other congeners.

Description. Head: Upper frons yellowish white with lateral areas narrowly dark brown, lower frons yellowish white; vertex pale grey mixed with brown to dark brown laterally; labial palpus of male and female long, porrect, first segment light grey, second segment triangular, distally greatly widened, yellowish white, with brownish grey spots at base, dorsomedially, ventromedially and apex, apical segment yellowish white; male antenna with notch at of basal segment of flagellum.

Thorax: Pronotal collar brown mixed with dark brown; mesothorax with tegula light brown mixed with dark brown; mesonotum light brown with diffuse spots, brown to dark brown. Forewing ( Figs. 1 C–D) length 3.5–3.8 mm in males (n=3), 5.0 mm in female (n=1); male costal fold absent; termen slightly concave between R5 and M1; ground color light brown with diffused transverse, narrow, darker streaks; costal strigula 1 indistinct, strigulae 2–4 and 7–8 paired, strigulae 5, 6 and 9 single, light brown, paired strigulae separated by dark brown spots, termen with strigula 10 forming yellowish white spot between R5 and M1; basal fascia present as irregular patch extending from costa to midwing; subbasal fascia a dark brown, subrectangular patch extending from strigula 2 to 3 and from costa to R; median fascia a distinct, dark brown, oblique patch extending from costa to middle of discal cell, separated from small dark brown spot at base of M2; postmedian fascia present as short, oblique brown band, extending outward from costa to R5, wing apices brown mixed with dark brown, strigula 6 with irregular silvery stria extending from R2 to inner margin, strigula 7 with silvery stria extending obliquely to R5, ocellar region with irregular transverse band, brown mixed with dark brown, extending from R5 to tornus, near outer margin with short, transverse silvery stripe between M2 and CuA1 near outer margin, outer margin with narrow line of dark brown scales, extending from M1 to CuA1. Hindwing brown. Underside of forewing greyish yellow, strigulae on costa yellowish grey, strigula on termen yellowish white; underside of hindwing light brown.

Abdomen: Male genitalia ( Fig. 3 B) with tegumen densely setose laterally, elongate subrectangular, shoulders with dense microtrichia. Uncus short, small, bifid, subtriangular, pointing outward. Socii moderately large, teardrop-shaped, pendent, from base of uncus, with dense spiniform setae mixed with less dense smaller ones. Gnathos arising near mid-length of tegumen, with two rising bands, moderately sclerotized. Valva straight and rather wide subbasally, with large basal opening, with dense microtrichia from near base of sacculus to neck; sacculus sparsely setose basally, posterior margin to neck with patch of dense setae, dorsal and ventral margin sparsely setose, ventral margin with row of large, flattened spiniform setae with multidentate apices from outer surface of valva; neck sparsely setose; cucullus simple, short, rounded, densely setose, base of inner surface with group of dense, narrow spines, pointing basally, ventral margin with dense cluster of moderately long, flattened spiniform setae; juxta subtrapezoid, caulis moderately long; anellus closely surrounding basal 1/5 of phallus; phallus moderately long, sinuate, with five, deciduous cornuti. Female genitalia ( Fig. 4 B) with sternum VII moderately sclerotized, moderately densely scaled, scales denser near posterior margin, except sparsely setose near sterigma, posterior margin with small U-shaped emargination medially. Tergum VIII with two wide, shallow pouches, lateral triangular extensions with dense scales, moderately dense setae and microtrichia. Papillae anales densely setose; apophyses anteriores long and slender (same length as apophyses posteriores); sterigma simple, ostium bursae rather small, fused with emargination of posterior margin of S7, antrum forming narrow sclerotized cup, 1/4 length of ductus bursae; ductus bursae moderately long, widened toward corpus bursae, colliculum small, moderately sclerotized, not encircling ductus bursae, with large sclerotized bi-pronged plate narrowly encircling ductus bursae near middle and with two band-like projections with rounded tips extending into posterior portion of corpus bursae; corpus bursae spinulose except around two strong, blade-like signa with acute tips, left one larger than right one.

Holotype. 3. Thailand: Trat Prov.: Trat Agroforestry R. St., 12 ˚ 23'43"N 102 ˚ 40'32"E, ca. 30 m, 12–14 Oct 2012, N. Pinkaew; np 5526; KKIC slide no. NP 1547. Deposited in BMNH.

Paratype. Thailand: Trat Prov.: Trat Agroforestry R. St., 12 ˚ 23'43"N 102 ˚ 40'32"E, ca. 30 m, 12–14 Oct 2011 (1Ƥ) (np 5527; KKIC genitalia slide NP 1548); 18–19 Aug 2012 (23) (np 5371; KKIC genitalia slide NP 1544), 12–14 Oct 2011 (np 5528; KKIC genitalia slide NP 1550), all N. Pinkaew et al. Deposited in THNM and KKIC.

Distribution. Thailand (Trat).

Etymology. The specific name is derived from Latin bulla (=bubble), referring to the shape of the cucullus.

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 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).