Loboschiza rectanguluma Phosrithong and Pinkaew, 2018

Pinkaew, Nantasak & Phosrithong, Netnapa, 2018, Two new species of the genus Loboschiza Diakonoff, 1968 (Lepidoptera: Tortricidae: Olethreutinae) from Thailand, Zootaxa 4433 (3), pp. 595-600 : 598-600

Loboschiza rectanguluma Phosrithong and Pinkaew , n.sp.

( Figs. 2 , 4–5 , 7, 9 , 10–12 )

Diagnosis. The forewing pattern of L. rectanguluma is most similar to that of L. delomilta , but the hindwing of L. delomilta has a yellow patch, which is white in L. rectanguluma . The male genitalia of L. rectanguluma are similar to those of L. furiosa , but the socii form a round lobe with an apical-medial concavity in L. rectanguluma , whereas the concavity is absent in L. furiosa . The cucullus of L. rectanguluma has a patch of long setae along the ventral margin that is longer than that of L. furiosa . The female genitalia are similar to those of L. furiosa but differ in the shape of colliculum and the shape of the secondary sac at the entrance of the corpus bursa, which is smaller in L. rectanguluma .

Description. Haed: Upper frons orange, lower frons yellowish orange, vertex blackish mixed with orange; labial palpus porrect ( Fig. 2 ), first segment yellowish white, second segment slightly broadened to apex, yellowish white, with small blackish patch dorsomedially, third segment short, yellowish white. Antenna short, dark brown, not reaching middle of forewing costa, dorsobasally with narrow, orange longitudinal stripe. Thorax: Pronotal collar dark brown mixed with orange, tegulae orange in basal 2/3, brown in apical 1/3, mesonotum dark brown with orange band laterally and at posterior end. Forewing length 3.0–4.5 mm in male (n = 2) ( Fig. 4 ), 3.0 mm in female (n = 1) ( Fig. 5 ); costa evenly curved, rounded at apex, costa with blackish strigulae, apical 1/3 with four distinct, short, oblique, silvery striae; termen obliquely rounded; ground color orange with short, diffuse, narrow, longitudinal and transverse blackish lines, dorsum with subtriangular, blackish patch medially, with two transverse, narrow blackish bands: first extending obliquely from basal 1/3 of costa to middle of wing then separated by first branch extending inward to dorsum near wing base, the other extending outward to near tornus, second band extending obliquely from apical 1/3 of costa to between to CuA1; underside grayish brown with pale yellow along costa and termen. Hindwing dark brown with indistinct whitish patch medially; underside grayish brown with grayish white patch medially. Abdomen: Male genitalia ( Fig. 7 ) with tegumen ovate, moderately sclerotized; uncus reduced; socii ( Fig. 9 ) medially subsemicircular, with shallow excavation, sinuate dorsomedially, with moderately dense setae laterally, anterior surface with dense scale sockets in ventral half; gnathos with moderately sclerotized arms arising from apical 1/3 of tegumen; vinculum moderately sclerotized; juxta subtriangular; caulis short; anellus surrounding basal 1/4 of phallus; phallus long, basal 1/3 slightly curved and widened, remainder cylindrical, rather straight, with oblique apex; valva subrectangular, rather short; sacculus short, with dense patch of setae basally; cucullus long, about 2.5 times length of sacculus, with sparse setae ventrobasally extending to middle of cucullus ventromedially, dorsoapical corner round, ventroapical corner acutely pointed with single, short spine, dense patch of long setae along ventral margin extending from base to near ventroapical corner, apical half of cucullus with dense bristles. Female genitalia ( Fig. 10 ) with papillae anales wide, densely covered with setae; tergum VIII smooth, with moderately dense scale sockets on subtriangular lateral extension; sternum VII with large, moderately sclerotized plate, with dense undulate patch of scale sockets, posterior margin with U-shape emargination medially; sterigma absent, ostium bursae ( Fig. 11 ) simple, fused with emargination of sternum VII, antrum forming sclerotized cup 1/4 length of ductus bursae, followed by incomplete subtriangular ring; ductus bursae moderately long, ductus seminalis originating from small sac at entrance of ductus bursae; corpus bursae ovate with two round, scobinate patches near bursae neck ( Fig. 12 ).

Holotype. ♂, Thailand, Sa Kaeo Prov., Pang Sida N. P., 13°59'36''N, 102°12'21''E, ca . 165 m, 19 Oct 2017, N. Pinkaew, np 11193, ♂ genitalia slide NP 3490.

Paratypes. 1♂, 1♀, Thailand, Sa Kaeo Prov., Pang Sida N. P., 14°02'25''N, 102°15'56''E; ca . 310 m, 23 Aug 2017, N. Pinkaew, np 10758, ♂ genitalia slide NP 3330, 18 Oct 2017, N. Pinkaew, np 11100, ♀ genitalia slide NP 3489.

Etymology. The specific epithet rectanguluma refers to the rectangular shape of the valva.

Distribution. Eastern Thailand.

Figures

FIGURES 1–2. Head of Loboschiza. 1. L. bispina (holotype male). 2. L. rectanguluma (holotype male).

FIGURES 3–5. Adults of Loboschiza. (scale bars = 2 mm). 3. L. bispina (holotype male). 4. L. rectanguluma (holotype male). 5. L. rectanguluma (paratype female).

FIGURES 6–9. Male genitalia of Loboschiza. 6. L. bispina (holotype male). 7. L. rectanguluma (holotype male). 8. Bifid spine on right cucullus of L. bispina (holotype male). 9. Combined socii of L. rectanguluma (holotype male).

FIGURES 10–12. Female genitalia of Loboschiza. 10. L. rectanguluma (paratype female). 11. Ostium bursae and colliculum. 12. Signa.