Loboschiza subrectangula Anan and Pinkaew

Anan, Surachet, Dokchan, Paradorn & Pinkaew, Nantasak, 2016, Loboschiza Diakonoff (Lepidoptera: Tortricidae) from Thailand with descriptions of four new species, Zootaxa 4109 (1), pp. 81-88 : 87

Loboschiza subrectangula Anan and Pinkaew , n. sp.

Figs. 7 , 12

Diagnosis. Superficially, L. subrectangula is nearly indistinguishable from its congeners. However, it can be distinguished by the male genitalia which posses a large, subrectangular, ventral lobe from the cucullus which is unique in the genus.

Description. Head: Upper frons light orange, lower frons yellowish orange; vertex light orange mixed with light brown; labial palpus porrect, first segment yellowish orange, second segment distally strongly widened, yellowish orange, slightly darker orange distally, with small blackish patch dorsomedially, third segment small, yellowish orange. Antenna short, to less than middle of forewing, dark brown, dorsally with narrow band of orange scales basally.

Thorax: Pronotal collar, tegulae and mesonotum greyish brown mixed with orange. Hindlegs modified in male with a group of long, tibial pencil, greyish brown in contrast to a group of dense, blackish tufts basally. Forewing ( Fig. 7 ) broad, subtriangular, length 4.4–4.5 mm in male (n = 2), termen rather straight, costal margin with well developed, small blackish striae; two-toned wing pattern with basal 2/3 with orange bands on greyish brown ground, distal portion with blackish ground color with wide orange sinuous scribbles. Underside greyish brown, with white spots alternating with light brown along costa. Hindwing evenly greyish on both sides.

Abdomen: Male genitalia ( Fig. 12 ) with tegumen subovate with slightly bifid and medially concave apex, moderately sclerotized, dorsolaterally with dense scale sockets on anterior surface; uncus absent; socii membranous, small, bristled lobes; gnathos two lateral arms, moderately sclerotized bands fused with anal tube; vinculum moderately sclerotized; juxta small; caulis rather long; phallus moderately long and wide, base wider and weakly downcurved, with moderately dense cornuti sockets; valva moderately sclerotized, complex; sacculus small, with patch of moderately dense setae, neck very distinct; cucullus large, bilobed, densely setose, with a rounded dorsal lobe, ventral lobe very large, subrectangular, with a bipronged thorn at ventrodistal angle. Female unknown.

Holotype. ♂, Thailand, Nakhon Ratchasima Prov., Sakaerat ERS., 14°29'47"N, 101°54'59"E, ca 514 m, 27 Feb 2014, N. Pinkaew, np 6940, ♂ genitalia slide NP 2383. Deposited in KKIC.

Paratype. 1♂, Thailand, Nakhon Ratchasima Prov., Sakaerat ERS., 14°29'47"N, 101°54'59"E, ca. 514 m, 20 Mar 2015, N. Pinkaew, np 7605, ♂ genitalia slide NP 2564. Deposited in KKIC.

Etymology. The specific epithet subrectangula refers to the shape of the prominent ventral lobe of the cucullus.

Distribution. Northeast Thailand.

Remarks. Specimens were collected in the dry season in dry evergreen forest of the Sakaerat Environmental Research Station.

Figures

FIGURES 1 – 8. Adults of Loboschiza spp. (scale bars = 2 mm). 1. L. koenigiana (male), Nakhon Pathom. 2. L. koenigiana (female), Nakhon Pathom. 3. L. spiniforma, n. sp. (holotype male), Chanthaburi. 4. L. spiniforma, n. sp. (paratype female), Sa Kaeo. 5. L. bisulca, n. sp. (holotype male), Nakhon Nayok. 6. L. bisulca, n. sp. (paratype female), Nakhon Nayok. 7. L. subrectangula, n. sp. (holotype male), Nakhon Ratchasima. 8. L. lunata, n. sp. (holotype male), Nakhon Si Thammarat.

FIGURES 9 – 13. Male genitalia of Loboschiza spp. 9. L. koenigiana. 10. L. spiniforma, n. sp. (holotype). 11. L. bisulca, n. sp. (holotype). 12. L. subrectangula, n. sp. (holotype). 13. L. lunata, n. sp. (holotype).