Commoneria costaplica Pinkaew and Muadsub, sp. nov.

urn:lsid:zoobank.org:act: 9BD56930-9EA9-44B0-B5EA-CB127C86687E

(Figs. 3–4, 7–8, 9–12, 14, 16, 18–19)

Type Material. Holotype ♂. THAILAND: Sa Kaeo Prov., Pang Sida N.P., 13 o 59ʹ36ʺN, 102 o 12ʹ21ʺE, alt. 165 m; 19 Oct. 2017; Pinkaew et al. leg.; np11255 (genitalia slide NP4072); KKIC . Paratypes: 2♂, 1♀, THAILAND: Sa Kaeo Prov., Pang Sida N.P., 13 o 59ʹ36ʺN, 102 o 12ʹ21ʺE, alt. 165 m; 21 Dec. 2017; Pinkaew et al. leg.; np11439 (♂ genitalia slide NP4078), 14 o 00ʹ54ʺN, 102 o 11ʹ45ʺE; 21 Aug. 2017, np10680 (♂, genitalia slide NP4079), 14 o 02ʹ43ʺN, 102 o 15ʹ56ʺE; 23 Aug. 2017, np10737 (♀, genitalia slide NP4073), all specimens collected by Pinkaew et al. and deposited in KKIC .

Diagnosis. Commoneria costaplica sp. nov. is distinguished from other species in the genus by its distinct costal fold, vein R 1 strongly bent upwards connected with Sc near the costa, and a small patch of dense microtrichia at the anal angle in male forewing.

Description. Head (Figs. 7–8): Lower frons yellowish white, upper frons yellowish to light brown; vertex dark brown, iridescent in angled light; antenna brown, except basal segments dark brown; labial palpi porrect, first segment yellowish white, second segment upcurved, with margins rather parallel, yellowish, slightly darker to apex, apical segment short, yellowish.

Thorax: Pronotal collar, tegulae, and mesonotum dark brown, iridescent in angled light; without posterior crest. Forewing subrectangular, wingspan 13.2–15.8 mm in male (Fig. 3) (n = 3), 16.0 mm in female (Fig. 4) (n = 1); costal margin evenly curved; termen deeply notch below rounded apex between R 5 and M 1, followed by a moderately large subtriangular lobe at mid-termen, exceeding wing apex; male with costal fold in basal 1/3, ventral edge extending to Sc, R 1 strongly bent upward, fused with Sc near costa, extending along costa to middle of wing (Figs. 9, 12), with a rather small longitudinal patch of very dense microtrichia at anal angle (Figs. 9–10); costal fold covered with moderately long, narrow scales, dark brown, iridescent in angled light (Fig. 11); costal strigulae indistinct, except for a pair of distinctly large white strigulae near apex; basal 3/5 covered with dark greyish brown scales, apical 2/5 with brown ground color mixed with diffused transverse, sinuate striae, dark greyish brown, with first leaden line extending obliquely outward from middle of costa to R 3, followed by narrow dark brown extending obliquely outward from R 3 near costa to termen at M 1, beyond with the second leaden line extending obliquely outward from apical 1/4 of costa to R 4, with a row of three dark brown spots near termen between M 2 and CuA 2, most distinct at top spot; underside dark greyish brown, iridescent in angled light, with trace of a pair of white strigulae on costa near wing apex and a small white spot at deeply notch termen between R 5 and M 1, apical half of costa covered with a patch of long, narrow scales, iridescent in angled light. Hindwing brown throughout in male, slightly paler to base in female; underside light brown, slightly paler at anal area; fringe scales with inner row dark brown, outer row light brown; female with 4 spines in frenulum.

Abdomen: Pregenital abdomen in male (Fig. 14) with sternum II bearing large anterolateral process; sternum VIII with a transverse, narrow, widely zigzag sclerotized line along anterior margin; tergum VIII with a small, transverse sclerotized ridge posteromedially, covered with short densely setose, posterolaterally with large patches of dense, inflated scales. Male genitalia (Fig. 16) with tegumen narrow, weakly sclerotized, subtriangular tapering to rounded apex; uncus and socii absent; gnathos very weakly sclerotized band; vinculum moderately sclerotized narrowed band; juxta subtriangular; caulis rather short; phallus rather long, basal 2/3 broad, widened medially, apical 1/3 narrower, subcylindrical; valva moderately long and slender with nearly straight costa; sacculus small with a small patch of dense setae basally, ventral margin with a subtriangular lobe, rounded angle projecting ventrally, moderately dense setae, followed by a deep excavation; cucullus long, widened medially, densely setose, with a rather small subtriangular lobe ventrobasally, rounded apex pointing ventrally, without setae. Female genitalia (Figs. 18–19) with papillae anales broad, flat, densely setose; posterior margin of sternum VI with a sclerotized ridge, widely curved medially with protruding lobe at posterolateral corners, covered with dense scale sockets; posterior margin of sternum VII with a deeply excavation, V-shaped medially, posteromedially with ostium small and rounded near anterior margin; ductus bursae rather short, shorter than corpus bursae, posterior half much smaller than anterior half, with an incomplete narrow sclerotized ring at ostium; ductus seminalis arising at entrance of corpus bursae; bulla seminalis present; corpus bursae large ovate with two small thorn-like signa (Fig. 19).

Distribution. Thailand (Sa Kaeo province).

Etymology. The specific epithet (costa = costal / plica = fold) refers to the costal fold on fore wing.