Fibuloides khaonanensis Pinkaew

Pinkaew, Nantasak, 2008, A new species and two new combinations in the genus Fibuloides Kuznetsov (Lepidoptera: Tortricidae: Eucosmini) from Thailand, Zootaxa 1688, pp. 61-65 : 62-65

Fibuloides khaonanensis Pinkaew , new species

( Figs. 1–3 )

Diagnosis. This species is most similar to F. cyanopsis (Meyrick) in forewing pattern; the presence of a short, rounded cucullus; and the presence of transverse bands of modified scales on the abdomen. It differs from F. cyanopsis in forewing pattern, with the basal half of the wing with a patch formed from confluent basal, subbasal, and median fasciae, extending from the costa to the inner margin; the cucullus having a subtriangular lobe basoventrally; and abdominal tergites IV, V, VI, and VII with transverse bands of modified scales on their anterior margins.

Description. Head: Upper frons brownish orange to light brown, lower frons orange white; labial palpus with first segment yellowish white; second segment yellowish white to orange white with brown spots basally and dorsomedially, brown to dark brown spots ventroapically at 2/3 length and apically, apical segment brownish orange; vertex light brown to brown mixed with dark brown laterally; antenna with notch at basal subsegment of flagellum.

Thorax: Pronotal collar light brown to brown; tegula brown mixed with dark brown on basal 1/3; mesonotum pale orange, anterior half mixed with scattered light brown scales, posterior half brown to dark brown, posterior scale-tufts absent. Forewing ( Fig. 1 ) length 6.6–6.7 mm in males (n=4); male costal fold absent; R4 and R5 stalked 1/5 length of R5; termen slightly concave below apex; ground color light brown; costal strigulae 2–9 paired, pale yellow, and separated by dark brown, strigula 1 indistinct, termen with strigula forming pale yellow spot between R5 and M1; basal, subbasal, and median fascia indistinct, confluent, forming large patch extending from wing base to middle of wing, from costa at strigula 6 to inner margin, brown mixed with dark brown scales, metallic grayish blue when angled to light, distal margin of patch extending obliquely outward from costa to base of R4, angled, and extending inward to middle of inner margin; postmedian fascia extending obliquely outward from costa between strigulae 6 and 7 to R5 near outer margin, dark brown mixed with brownish orange, preterminal fascia extending obliquely outward from costa between strigulae 8 and 9 to R5 near outer margin, strigulae 5 and 6 with silvery striae becoming confluent and bordering postmedian fascia to R5, strigula 7 with silvery striae extending obliquely to R5, strigulae 8 and 9 with silvery striae reduced to small spots, pretornal subtriangular spot extending from inner margin to CuA1 (M 3 in some specimens), dark brown, ocellar region with dark brown irregular patch extending from R5 to CuA1. Underside light brown, strigulae on costa and termen yellowish gray. Hindwing brown dorsally, light brown ventrally, anal margin with long scale-tufts, light brown.

Abdomen: Tergum IV, V, VI, and VII anteriorly with transverse patches of specialized scales ( Fig. 3 ). Male genitalia ( Fig. 2) with tegumen narrow basally, swollen dorsally, with group of dense setae posteriorly, moderately setose along ventral 2/3; uncus small and short, bifid, apices pointed; socii large, triangular, apically rounded, arising from base of uncus, pendant to 1/4 of tegumen length, moderately setose; gnathos arising from near tegumen ca. at half length, forming a ribbonlike band, with two sclerotized bands arising medially; anellus closely surrounding basal 1/3 of aedeagus, cuplike dorsally; aedeagus moderately long, basal half enlarged, with 9 deciduous cornuti; juxta triangular, truncate ventrally; valva with large basal excavation, moderately setose from base to middle of sacculus, medially with strip of dense, large, flat setae, apically pointed, with strip of larger, flat setae, apically pointed, mixed with strip of dense, short setae along outer ventral margin; dorsally with dense spines from basal opening to cucullus, neck slightly excavated ventrally; cucullus short, rather round, densely setose except apicoventral 1/3, basoventrally with moderate subtriangular lobe protruding ventrally close to neck (n = 4).

Holotype. Male. Thailand: Nakhon Si Thammarat Province: Khao Nan N.P., 08°46'19''N 99°48'12''E, 23 Jun 2006, N. Pinkaew [specimens no.] np1625; male [genitalia slide] NP861. Deposited in ANIC.

Paratypes. Thailand: Nakhon Si Thammarat Province: Khao Nan N.P., 08°46'19''N 99°48'12''E, 13 May 2006 (1ɗ, genitalia slide NP891), 23 Jun 2006, (1ɗ, genitalia slide NP892), 08°46'14''N 99°48'10''E, 23 Jun 2006, (1ɗ, genitalia slide NP756), all collected by N. Pinkaew. Deposited in KKIC.

Etymology. The specific epithet refers to Khao Nan National Park.

Distribution. Thailand (Nakhon Si Thammarat Prov.).

Remarks. This species was collected during the dry summer season in evergreen forest at 375 m.

Figures

FIGURE 1. Fibuloides khaonanensis, adult male.

FIGURE 3. Fibuloides khaonanensis, dorsal view of male abdominal segment with scale patches. Scale bar: 0.5 mm.