Sirindhornia chaipattana Pinkaew and Muadsub, 2014

Muadsub, Sopita & Pinkaew, Nantasak, 2014, Sirindhornia Pinkaew and Muadsub (Lepidoptera: Tortricidae), a new enarmoniine genus from Thailand, Zootaxa 3869 (1), pp. 53-63 : 59-61

Sirindhornia chaipattana Pinkaew and Muadsub , n. sp.

Figures 1C–D , 3C–D , 4B , 5B

Diagnosis. Sirindhornia chaipattana is most similar to S. curvicosta , both with a broad nearly white distal margin to the white and black basal half of the forewing and a black line from before middle of costa downcurved and running towards dorsum, but S. chaipattana can be recognized by an evenly curved costa resulting in a broad apex. In the male genitalia S. chaipattana has a more broadly triangular uncus and a medially more sharply narrowed dorsal anellus process than S. curvicosta . The small sclerotized cup at the end of the ductus bursae and the two narrow small spinulose lobes of S. chaipattana are unlike the sterigma of any other known Sirindhornia female.

Description. Head: As described for genus ( Fig. 1C–D ), except third segment of labial palpus with black scales in vertical groove on anterior face. Antenna with some white scales on scape and pedicel, and a few scattered on basal segments of flagellum.

Thorax: As described for genus, except tegulae white with two oblique black lines. Forewing length 5.2 mm in male (n = 1) ( Fig. 3C ), 4.9–5.3 mm in female (n = 2) ( Fig. 3D ); basal 2/5 white, with numerous, slender, connected black lines and spots concentrated towards base and a distal white band with only few irregular black dots, distal 3/ 5 with reddish orange ground color, its inner margin near costa preceded by small black spots and followed by a parallel, sharply angled silvery band, slightly widening from costa to dorsum; strigulae and marks along costa as for genus, with black line from before middle of costa downcurved and deeply sinuate, not to notch; triangular white mark at notch; remainder of orange wing portion with rather narrow, sinuate, slightly confluent silvery blackish bands and few black spots. Fringe with white at notch. Underside as for genus. Hindwing dark grey to blackish, with narrow orange patch along termen from apex to M 2, orange patch in center and whitish to orange streak in anal region. Underside as for genus, with two longitudinal, greyish orange patches at middle of wing, divided by darker streak along fold between M 1 and M 2.

Abdomen: Male genitalia ( Fig. 4B ) with tegumen moderately sclerotized; uncus flat, wide, subtriangular, dense setae dorsally, laterally connected with large, curved and raised subtriangular socii, densely setose, with two to three huge thorns on distal process and with curved and narrow sclerotized gnathos arms at base, medially connected by membrane; vinculum weakly sclerotized, wide; juxta small, caulis rather short; dorsal anellus process medially much narrower, with microtrichiae at apex; phallus long, slightly curved, bulbous in basal half and slight tapering to apex; valva narrowly elliptical, pointed with narrowly rounded apex, with rather short costal hook below sinuate costa; sacculus only small basal thickening, with dense setae along margin. Female genitalia ( Fig. 5B ) with papillae anales and tergum VIII as for genus; sterigma a small patch of dense spinules, laterally with two narrow, sclerotized ridges, covered with spinules on each side; ostium a small sclerotized cup beyond concave posterior margin of weakly sclerotized sternum VII; with a moderately sclerotized colliculum; ductus bursae shorter than ductus bursae length, narrow medially; ductus seminalis arising from transition of corpus to ductus bursae; corpus bursae ovate, granulate, with two large signa, subtriangular blades with elongate hollow base.

Holotype: ♂, Thailand, Chanthaburi Prov., Ang-Ed Com. for., ca 33 m, 12°36'04"N 102°19'50"E, 22–23 Dec 2011, N. Pinkaew. np 6230, ♂ genitalia slide NP 2068. Deposited in BMNH.

Paratype: 2♀, Thailand, Chanthaburi Prov., Ang-Ed Com. for., ca 33 m, 12°36'04"N 102°19'50"E, 22–23 Dec 2011, N . Pinkaew. np 6231 , ♀ genitalia slide NP 2069, N . Pinkaew. np 6232 , ♀ genitalia slide NP 2070. Deposited in KKIC .

Etymology. The specific epithet chaipattana refers to the Chaipattana Foundation which supports the Ang-Ed community forest.

Distribution. Thailand.

Remarks. Specimens were collected in the dry season in areas of the 50-year old rubber tree plantation which were reforested to secondary forest.

Figures

FIGURE 1. Head of Sirindhornia spp. A–B. S. pulchella, n. sp. (holotype male). C–D. S. chaipattana, n. sp. (holotype male). E–F. S. curvicosta, n. sp. (holotype male). G–H. S. bifida, n. sp. (holotype male). I–J. Sirindhornia sp. (female).

FIGURE 3. Adults of Sirindhornia spp. A. S. pulchella, n. sp. (holotype male). B. S. pulchella, n. sp. (paratype female). C. S. chaipattana, n. sp. (holotype male). D. S. chaipattana, n. sp. (paratype female). E. S. curvicosta, n. sp. (holotype male). F. S. bifida, n. sp. (holotype male). G. Sirindhornia sp. (female) (Scale bar = 2 mm).

FIGURE 4. Male genitalia of Sirindhornia spp. A. S. pulchella, n. sp. (holotype). B. S. chaipattana, n. sp. (holotype). C. S. curvicosta, n. sp. (holotype). D. S. bifida, n. sp. (holotype).

FIGURE 5. Female genitalia of Sirindhornia spp. A. S. pulchella, n. sp. (paratype). B. S. chaipattana, n. sp. (paratype). C. Sirindhornia sp.