Anarsia laosana Park, 2018

Park, Kyu-Tek & Bae, Yang-Seop, 2018, The genus Anarsia Meyrick (Lepidoptera, Gelechiidae) in Laos, with description of a new species and ten new records of the genus, Zootaxa 4399 (2), pp. 272-280 : 273-274

Anarsia laosana Park , sp. nov.

( Figs. 2, 2a, 3, 3a–c, 4, 5, 5a, 6 )

Type material. Holotype: 6, Ban Tha , Xiengkhouang Prov., 19°44'50''N, 103°37'28''E, 29 vi 2017, Bae et al., genital (gen.) slide no. CIS-6791 . Paratype: 3 6, same locality, 19°44'50''N, 103°37'28''E, 20 xi 2017, gen. slide no. CIS-6792; 1 6, 1♀ , same locality, 19°43'00''N, 103°36'24''E, 19 xi 2017, gen. slide no. CIS-6793.

Diagnosis. This new species is distinguished from the previously known species of the genus by the forewing with various discal black markings instead of the triangular or crescent costal patch. The male genitalia are more or less similar to those of A. choana Park , but can be distinguished by the left valva with much smaller basal process and the right valva narrowed in the basal 2/5.

Description. Adult: Male ( Fig. 2 ) and female. Wingspan 14.5–15.5 mm. Head shiny, creamy white. Basal segment of antenna densely covered with yellowish-brown scales dorsally; flagellum greyish-brown with dark brown annulations. Second segment of labial palpus in male quadrate, with dense scale tuft ventrally, creamy white speckled with small dark brown scales on upper part and dorsal surface, metallic black on outer surface, creamy white on inner surface; 3rd segment vestigial; in female, 2nd segment smaller than that of male; 3rd segment normally developed, slender, strongly recurved, basal 1/3 creamy white with narrow black band in the middle, then broadly black, and apical 1/4 creamy white. Tegula creamy white dorsally, black anteriorly. Thorax creamy white. Forewing elongate, slightly narrowed distally; ground color creamy white, irregularly scattered with pale orange scales; basal streak black; costa expanded anteriorly in basal 2/5, then slightly concave medially; four black, triangular costal patches beyond 1/4, at middle, at distal 1/5 and 1/6; subbasal black fascia originating from the first costal patch and reaching to inner margin, slightly arched inwardly; median fascia weakly developed, connecting to oblique post median black streak with a transversal black band; a large irregular black patch presented below 4th costal patch; apex obtuse; termen oblique; with a long hair-pencil near base of cell on under surface. Venation ( Fig. 5 ) with Sc slightly curved in S-shaped; R1 arising from middle of discal cell; distance between origins of R1 and R2 at base slightly longer than that of R2 and R3; R3 from near upper corner of cell; R4 stalked with R5 for about 2/5; R5 to costa; M1 stalked with R4+5 for basal 1/5; M2, M3 and CuA1 free; cell weakly closed. Hindwing broader than forewing; costa broadly expanded from base to 3/5; venation with Rs and M1 short stalked; M2 originating from beyond middle of cross vein of cell; M3 connate to CuA1 at base, arising from near lower corner of cell; cell closed.

Male genitalia ( Figs. 3, 3a–c ): Caudal margin of abdominal sternite VIII deeply emarginated medially. Uncus short, slender, exceeding apices of socii. Socii elongate-ovate, caudal margin truncate. Tegumen slightly expanded laterally beyond middle, then narrowed toward apex with small lateral expansion medially. Valvae asymmetrical; left valva large, oval, as long as tegumen, inflated medially, with large membranous sac on surface, dorsal margin strongly convex medially, ventral margin slightly convex; basal process slender, heavily sclerotized, strongly curved beyond middle in S-shape, about 2/5 length of valva, acute apically; zone of modified scales narrower toward base, reaching less than half; right valva narrow in basal 2/3, with nearly straight costal margin, slightly broadened ventrally toward distal part; cucullus elongate-quadrate, zone of modified scales occupied in lower 2/3, with a small membranous lobe near basal 1/4 on ventral margin; apex rounded. Juxta large, with two rows of sclerotized vertical ridge medially. Phallus very small, strongly arched medially, trumpet-shaped, heavily sclerotized in basal 3/5, with a small quadrate, weakly sclerotized plate at basal 1/4, strongly ankylosed with juxta and vinculum.

Female genitalia ( Figs. 6, 6a ): Apophyses posteriores about 1.5 times length of papillae anales. Apophyses anteriores very short, forming a triangle. Abdominal sternite VIII with large, rounded membranous pouch anteriorly. Ostium bursae V-shaped, membranous; antrum weakly sclerotized. Ductus bursae very short, narrow, about 1/7 the length of corpus bursae. Corpus bursae very large, pear-shaped; signum horn-shaped, heavily sclerotized, directed to anterior end.

Distribution. So far only known from Laos.

Etymology. The species name is derived from the country name, Laos.

Figures

FIGURES 2–6. Anarsia laosana Park, sp. nov.: 2, Adult, paratype; 2a, Labial palpus of male; 2b, Labial palpus of female; 3, Male genitalia; 3a,Vinculum complex; 3b, Phallus; 3c,close-up of phallus; 4, Abdominal segment VIII; 5,Venation;6,Female genitalia; 6a, Close-up of signum.