Argyresthia (Argyresthia) lanosa Liu, Wang & Li, 2017, sp. nov.
Creators: name: Liu, Tengteng
name: Wang, Shuxia
name: Li, Houhun
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Yponomeutidae
Argyresthia
Argyresthia lanosa

description: 53. Argyresthia (Argyresthia) lanosa, sp. nov. (Figs. 6, 65, 131, 187, 243, 289, 301, 304)
Description. Adult (Fig. 65) wingspan 8.5̄11.0 mm. Head with vertex white, frons pale fuscous, face pale golden fuscous. Labial palpus yellow, mixed with fuscous laterally. Antenna with scape white, tinged with yellow on anterior and posterior margins, pecten golden fuscous; flagellum black dorsally, yellowish white ventrally, dotted with pale yellow on each flagellomere dorsally. Foreleg black on inner surface, tibia dotted laterally with black at basal 1/3, at middle, and distally, first tarsomere dotted laterally with black near middle and distally, second to third tarsomeres black distally, distal two tarsomeres black, remainder pale yellow; midleg mostly yellowish white, femur dotted with black at base and middle on inner surface, tibia dotted dorsally with black near base, at middle, and distally, first tarsomere dotted dorsally with black near middle and distally, second and third tarsomeres black on dorsal surface distally, distal two tarsomeres black dorsally; hindleg mostly grayish white, femur with a pale gray dot at middle laterally, tibia gray laterally and black distally, each tarsomere black distally except last tarsomere. Thorax white, sometimes tinged with pale yellow; tegula golden fuscous. Forewing ratio 5.5; rust fuscous, with dense transverse fuscous striae; costa with basal 4/5 tinged with yellow, with about 15 transverse blackish-fuscous striae; golden fuscous streak below basal 2/5 of fold, with a small blackish-fuscous spot at its end; fold with a blackish-fuscous spot at distal 1/5, slightly V-shaped, its lower margin usually reaching dorsum as a few concolorous scales; distal 3/10 with several white dots along costal and dorsal margins; dorsal band white, sometimes tinged with pale yellow, with scattered fuscous scales; blackish-fuscous spot near tornus; cilia golden fuscous on costa and around apex, gray mixed with pale yellow on termen and near tornus. Hindwing and cilia uniformly gray. Abdomen blackish gray on dorsal surface; ventral surface pale yellowish white in male, pale yellowish white on second to sixth segments, pale fuscous on seventh segment in female. Male with lateral lobe of eighth abdominal segment with an angle of 61̄64° (n = 11) between lines linking apex to dorsal base and to ventral base (Fig. 301); female with tergite and sternite concave medially on posterior margin of seventh segment (Fig. 304).
Male genitalia (Figs. 131, 187, 243): Tuba analis longer than width of valva. Socius with a process before middle on posterior margin with one or rarely two scale-like setae basally, two similar setae near apex, two setae apically; distal half covered with three (rarely two) to six scale-like setae (Fig. 243). Gnathos inflated distally, with three to five long thick setae apically. Valva basal 2/3 nearly uniform in width, distal 1/3 slightly narrowed to rounded apex, dorsal margin arched, ventral margin convex medially; a row of long setae from base medially to distal area, with dense short setae on ventral margin. Saccus longer than width of valva, narrowly triangular, slightly hooked distally. Phallus about 6.5 times as long as width of valva, strongly arched from basal 1/5 to distal 3/10, straight on distal 1/3 (Fig. 187). Second sternite with about eight micro-setae in each row; eighth sternite V or rarely Y-shaped. Coremata present.
Female genitalia (Fig. 289): Ovipositor 3.0 times as long as eighth segment. Anterior apophysis 2/3 length of posterior apophysis, bifurcate at middle; branch bifurcated a second time, with dorsal branch extending to lamella postvaginalis, ventral branches fused, forming ventral margin of ostium bursae. Lamella postvaginalis triangular, concave anteriorly. Antrum cylindrical, 3/5 the length of eighth segment. Ductus bursae spinulate before and near opening of ductus seminalis and near corpus bursae; ductus seminalis originating from anterior 2/5 of ductus bursae. Corpus bursae nearly ovate, slightly concave at middle laterally, densely denticulated posteriorly; signum with basal plate short; horns extending almost horizontally, anterior margin straight.
Type material. CHINA: Holotype, Ƌ, Mt. Jizu (25.96°N, 100.39°E), Dali City, Yunnan Province, 2228 m, 27.vii.2014, leg. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, slide no. LTT12625. Paratypes: Yunnan Province: 7Ƌ, 11♀, same data as holotype, except 27̄ 29.vii.2014, slide no. LTT12637̄8Ƌ, LTT12644Ƌ, LTT12650♂, LTT12651♀, LTT12660♀; 151♂, 249♀, Mt. Weibaoshan (25.18°N, 100.34°E), Weishan County, Dali City, 2205 m, 30, 31.vii, 1̄ 3.viii.2014, leg. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, slide nos. LTT12624Ƌ, LTT12641Ƌ, LTT12645Ƌ, LTT12647̄8Ƌ, LTT12649♀, LTT12659♀, LTT12666♀, DNA voucher slide nos. NKU_ARG_010Ƌ (GenBank KY570298), NKU_ARG_011♀ (GenBank KY570299), NKU_ARG_017♀ (GenBank KY570300); 12♂, 12♀, Weibaoshan (25.18°N, 100.34°E), Weishan County, Dali City, 2200 m, 20.vii.2001, leg. Houhun Li and Xinpu Wang, slide nos. XYL03433Ƌ, LTT12285♀, LTT12286Ƌ, LTT12622̄3♂, CPX14184♂; 1♀, Weibaoshan (25.18°N, 100.34°E), Weishan County, Dali City, 2240 m, 23.vii.2013, leg. Shurong Liu, Yuqi Wang, Kaijian Teng; 3♂, 1♀, Nankang Forest Station (24.82°N, 98.78°E), Baoshan City, 2009 m, 17.viii.2014, leg. Kaijian Teng, Shurong Liu and Hua Rong, slide no. LTT12628♂; 16♂, 12♀, Linjiapu (25.29°N, 98.70°E), Tengchong City, 2144 m, 14̄ 16.viii.2014, leg. Kaijian Teng, Shurong Liu and Hua Rong, slide nos. LTT12553♀, LTT12630♂, LTT12635̄6♂, LTT12663̄4♂, LTT12630W, LTT12635W; 1♂, 3♀, Xiaodifangxincun Village (24.87°N, 98.75°E), Tengchong County, 2116 m, leg. Kaijian Teng, Shurong Liu and Hua Rong, slide no. LTT12652♂; 4♂, 3♀, River Taiyang Nature Reserves (22.79°N, 100.98°E), Puer City, 1450 m, 31.iii, 19, 23.viii.2014, leg. Zhenguo Zhang, slide nos. LTT12616♂, LTT12617♀; 1♂, 1♀, Xishuangbanna plant garden (21.93°N, 101.26°E), 550 m, 15.iii.2014, leg. Zhenguo Zhang, slide no. LTT12618♂; 1Ƌ, 1♀, Baihualing (25.29°N, 98.81°E), Mt. Gaoligong, Baoshan City, 1473 m, 29, 30.vii.2013, leg. Shurong Liu, Yuqi Wang and Kaijian Teng; 1♂, Baihualing (25.29°N, 98.81°E), Baoshan City, 1473 m, 5.viii.2014, leg. Kaijian Teng, Shurong Liu and Hua Rong, slide no. LTT12627. Guizhou Province: 1♀, Huaxi (26.44°N, 106.68°E), Guiyang City, 1100 m, 25.vii.2001, leg. Houhun Li and Xinpu Wang, slide no. LTT12287.
DNA sequences: Three COI barcodes were available (one male and two females). The intraspecific genetic distance is 0.2̄0.3% among them (Table 2).
Distribution. China (Guizhou, Yunnan).
Diagnosis. Argyresthia (A.) lanosa, A. (A.) angusta Moriuti, 1969, and A. (A.) surrecta are extremely similar superficially and cannot be separated reliably by forewing pattern. Argyresthia (A.) lanosa can be distinguished from the other two species by the lateral lobe of the eighth abdominal segment with an angle of 61̄64° between the lines linking the apex to the dorsal base and to the ventral base in the male, and both the seventh tergite and sternite concave medially on the posterior margin in the female. Argyresthia (A.) angusta can be reliably separated by the wider forewing (ratio 5.0); the forewing ratio in other two species is 5.5. The most reliable diagnostic characters for all three species lie in the male genitalia: Argyresthia (A.) surrecta can be easily separated by the nearly straight phallus, which is curved in the other two congeners; A. (A.) lanosa can be separated from A. (A.) angusta by the valva with dense short setae on the ventral margin, which are absent in the latter (Fig. 129). Another congener, A. (A.) notoleuca (Turner, 1913), isolated in the Australian region, is close to the abovementioned three species, but it has distinct differences in the genital features (Common 1990).
Etymology. The specific name is derived from the Latin lanosus, meaning with dense pubescence, referring to the dense short setae on the ventral margin of the valva in the male genitalia.
Remarks. Argyresthia (A.) surrecta and A. (A.) lanosa are almost identical externally and are sympatric, sometimes collected at a same site, which complicates unambiguous association of the sexes of the two species. A preliminary association was made using specimens from a single trapping site where only one type of male and one type of female genitalia were found after dissection. DNA barcoding confirmed the association. Based on external characters, the features on the pregenital segments are visually distinct between the two congeners and are reliable for identification without dissection.
description: Published as part of Liu, Tengteng, Wang, Shuxia & Li, Houhun, 2017, Review of the genus Argyresthia Hübner, [1825] (Lepidoptera: Yponomeutoidea: Argyresthiidae) from China, with descriptions of forty-three new species, pp. 1-135 in Zootaxa 4292 (1) on pages 64-66, DOI: 10.5281/zenodo.827746