Sirindhornia bifida 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 : 61-62

publication ID	https://doi.org/ 10.11646/zootaxa.3869.1.5
publication LSID	lsid:zoobank.org:pub:49650047-A8D2-4640-879B-5FA1E14FBD94
DOI	https://doi.org/10.5281/zenodo.4930872
persistent identifier	https://treatment.plazi.org/id/4F598D31-6C77-FFC8-FF39-F9CFFD83FC00
treatment provided by	Felipe
scientific name	Sirindhornia bifida Pinkaew and Muadsub
status	sp. nov.

Treatment

Sirindhornia bifida Pinkaew and Muadsub , n. sp.

Figures 1G–H View FIGURE 1 , 3F View FIGURE 3 , 4D View FIGURE 4

Diagnosis. Sirindhornia bifida is the only species without a central orange mark in the hindwing, and together with Sirindhornia sp. (discussed below), can also be distinguished from all other known species of Srinidhornia by relatively large and confluent black spots in basal half of the forewing, diagonally connecting the base and the orange distal part, by the wide and strongly interconnected black lines in the distal half, and by the black line from middle of the costa straight to below the notch then downcurved parallel to termen. The entirely white labial palpi, an evenly curved costa, and much paler hindwings separate S. bifida from Sirindhornia sp. In the male genitalia the very narrow valva and a distally free, finger-like sacculus and a small narrowly ovate phallus are unique for the genus.

Description. Head: As described for genus ( Fig. 1G–H View FIGURE 1 ), but third segment of labial palpus entirely white.

Thorax: As described for genus, but tegulae with central ovate black spot and black scales at base. Forewing length 3.8 mm in male (n = 1) ( Fig. 3F View FIGURE 3 ); basal white area relatively short, 1/3 length to middle of termen, with relatively large and confluent black spots, some diagonally connecting base and orange distal wing part; distal 2/3 with orange ground color, its inner margin near costa preceded by two conspicuous black spots, medially somewhat projecting inward and from middle of wing edged by wide blackish band vertically to dorsum; strigulae and marks along costa as for genus but black line from middle of costa long, straight then ending in vertical, narrow band along middle of termen; notch with a small white mark; remainder of orange wing portion with wide, sinuate, strongly interconnected black bands and few black spots. Fringe as for genus. Underside as for genus. Hindwing with orange band along termen from apex to M 3, without orange patch near center. Fringe as for genus. Underside without patch.

Abdomen: Male genitalia ( Fig. 4D View FIGURE 4 ) [damaged] with socii bearing dense flattened modified spines on outer surface and 3 huge thorns on process projecting from outer margin, and with sclerotized gnathos arms along base; phallus small, narrowly ovate, more slender at base; valva long, narrow, spatulate, with distally free sacculus forming finger-like, slightly curved, setose process, outer valva surface with patch of long, modified scales in basal half, costal hook short with rounded tip.

Holotype: ♂, Thailand, Trat Province, Trat Agroforestry R. St., 12°23'43"N 102°40'32"E, ca 30 m, 21–23 Apr 2013, N. Pinkaew, np 5007, ♂ genitalia slide NP1786. Deposited in KKIC. GoogleMaps

Etymology. The specific epithet bifida means ‘divided into two parts’ in Latin, referring to the sacculus which is distally separated from the valva.

Distribution. Thailand.

Remarks. This single male was collected in summer in the agroforestry ecosystem of the Trat Agroforestry Research and Training Station. Despite the highly modified genitalia, we name this species even though its genitalia are somewhat damaged.