Sirindhornia pulchella 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 : 55-57

Sirindhornia pulchella Pinkaew and Muadsub , n. sp.

Figures 1A–B , 2 , 3A–B , 4A , 5A

Diagnosis. Unlike the other known species of this genus, the forewing of S. pulchella has a regular transverse row of small dots in the distal part of the white and black basal half, and the black line from before the middle of the costa runs nearly straight to the notch. Diagnostic characters in the male genitalia are two large thorns on distal process of the socii, a wide valva with a pointed large costal hook, a long distally tapering phallus, and a narrow anellus process with a widened apex. The sterigma with two large spinulose lobes separates S. pulchella from the other two species in which the females are known.

Description. Head: As described for genus ( Fig. 1A–B ), except third segment of labial palpus with black scales in vertical groove on anterior face in both sexes. Antenna as described for genus, with some white scales on scape and pedicel, and a few scattered along flagellum.

Thorax: As described for genus, except tegulae white with thin black line along inner margin then recurved to center, and short black line on outer margin near base. Forewing length 4.8–5.0 mm in male (n = 2) ( Fig. 3A ), 4.5 mm in female (n = 1) ( Fig. 3B ); basal 2/5 white, with numerous, slender, connected black lines concentrated towards base, larger mark at 1/3 and with isolated, minute black dots more distally; distal 3/5 with orange ground color, its inner margin near costa preceded by two black spots and followed by a parallel, angled silvery band, slightly widening from costa to dorsum; strigulae and marks along costa as for genus, but oblique black line from beyond middle of costa weak, interrupted below costa and very faint behind 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 as for genus, white at notch. Underside as for genus but with small, transverse orange band middle of termen. Hindwing as for genus, with narrow orange band along termen from apex to M 2 and longitudinal orange patch in center of wing. Underside as for genus, with two longitudinal, narrow, greyish orange patches divided by darker streak along fold between M 1 and M 2, with only the more posterior one reaching to termen.

Abdomen: Male genitalia ( Fig. 4A ) with tegumen ovate, moderately sclerotized; uncus flat, pentagonal, medially notched, with dense setae dorsally, laterally connected with large, curved and raised subtriangular socii, with dense, flattened spines on outer surface and two huge thorns on distal process, sclerotized gnathos arms at base short and evenly curved; vinculum weakly sclerotized, wide; juxta small, caulis rather short; anellus with long sclerotized dorsal process spatulate, with microtrichiae at apex; phallus long, slightly curved medially, bulbous in basal half and slight tapering to apex, without cornuti; valva straight and simple, elliptical with narrowly rounded apex, with long pointed costal hook below sinuate costa; sacculus only small basal thickening, with dense setae along margin; modified scales on outer valva surface scattered. Female genitalia ( Fig. 5A ) with papillae anales and tergum VIII as for genus; sterigma a large patch of dense spinules, with a projecting pyramid-shaped lobe covered with spinules on each side, and with some microtrichia below ostium margin; ostium a sclerotized funnel beyond straight posterior margin of weakly sclerotized sternum VII; without colliculum; ductus bursae long, anterior half very narrow, posterior half distinctly wider, ductus seminalis arising from transition of corpus to ductus bursae; corpus bursae ovate, granulate, with two large unequal signa, long triangular blades with elongate hollow base.

Holotype: ♂, Thailand, Nakhon Si Thammarat Prov., Khao Nan N. P., 08°47'00"N 99°47'46"E, ca 125 m, 9 Jan 2008. N. Pinkaew. np 2439, ♂ genitalia slide NP 2005. Deposited in BMNH.

Paratypes: 1♂, 1♀, Thailand, Nakhon Si Thammarat Prov., Khao Nan N. P., 08°46'55"N 99°47'44"E , ca 123 m, 3 May 2008, N . Pinkaew. np 2696 , ♂ genitalia slide NP 1187, N . Pinkaew. np 2703 , ♀ genitalia slide NP 1184. Deposited in KKIC .

Etymology. The specific epithet pulchella means beautiful in Latin, referring to the wing pattern and color of this species.

Distribution. Thailand.

Remarks. Specimens were collected in evergreen forest of the Khao Nan National Park.

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 2. Wing venation of Sirindhornia pulchella, n. sp. (paratype male, right wings).

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.