Blastobasis edentula, Teng & Wang, 2019

Teng, Kaijian & Wang, Shuxia, 2019, Taxonomic study of the genus Blastobasis Zeller, 1855 (Lepidoptera: Blastobasidae) from China, with descriptions of six new species, Zootaxa 4679 (1), pp. 25-46 : 41-42

publication ID	https://doi.org/ 10.11646/zootaxa.4679.1.2
publication LSID	lsid:zoobank.org:pub:09928042-5B9B-4EF6-86C1-9E72482F9A3F
persistent identifier	https://treatment.plazi.org/id/03848510-FF86-9E07-FF7F-C59AFD6FFA7C
treatment provided by	Plazi
scientific name	Blastobasis edentula
status	sp. nov.

Treatment

Blastobasis edentula View in CoL , sp. nov.

( Figs. 12 View FIGURES 4−13 , 22 View FIGURES 21−23 , 30 View FIGURES 27−30 )

Type material. China: Yunnan Province: Holotype ♂, Yexianggu (22.17°N, 100.87°E), Xishuangbanna, 762 m, 19.VII.2014, coll. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, genitalia slide No. TKJ17391. GoogleMaps

Paratypes (41♂, 16♀): 31♂, 10♀, same data as the holotype except dated 18‒20.VII.2014, genitalia slide No. TKJ17392 GoogleMaps ♂, TKJ17403 ♀, TKJ17404 ♀, TKJ17405 ♀, TKJ17407 ♀; 1♂, Yexianggu, Jinghong City , 762 m, 8.VIII.2016, coll. Kaijian Teng, Ga-Eun Lee and Tao Wang, genitalia slide No. TKJ17349 ; 1♂, Bubang , Xish- uangbanna, 656 m, 24.VII.2014, coll. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, genitalia slide No. TKJ17378 ; 1♀, Nanlahe, Bubang Town , Mengla County, 652 m, 12.VII.2013, coll. Shurong Liu, Yuqi Wang and Kaijian Teng, genitalia slide No. TKJ17381 . Hainan Province: 1♂, Mt. Diaoluo , Lingshui County, 980 m, 24.IV.2014, coll. Tengteng Liu, Wei Guan and Xuemei Hu, genitalia slide No. TKJ17478 ; 2♂, Jianfengling , Ledong County, 770 m, 29.V‒1. VI.2015, coll. Peixin Cong, Wei Guan and Sha Hu, genitalia slide No. TKJ17512 ; 1♂, Tian- chi, Jianfengling , 787 m, 17.I.2016, coll. Kaijian Teng, Xia Bai and Mengting Chen ; 1♂, 1♀, Lizudadian, Shuiman Town, Wuzhishan City , 766 m, 27‒28.II.2016, coll. Qingyun Wang, Suran Li and Shengnan Zhao ; 3♂, 4♀, Mt. Wuzhi , 738 m, 2‒3.III.2016, coll. Qingyun Wang, Suran Li and Shengnan Zhao.

Diagnosis. Blastobasis edentula is distinguished from congeners by the following: gnathos without denticles, but subtriangularly produced medially on the posterior margin; membrane above the proximal flange with spine-like setae on distal 2/3; and anellus bearing two short spine-like setae near base. The male genitalia are similar to those of B. aciformis , and the differences between them are given in the diagnosis of the latter.

Description. Adult ( Fig. 12 View FIGURES 4−13 ) forewing length 4.5–7.5 mm. Head: Brown, scales tipped with grayish yellow. An- tenna with scape brown on dorsal surface, tipped with grayish yellow partially, yellowish white on ventral surface; pecten brown; flagellum dark brown, first flagellomere dilated and notched in male. Labial palpus in male dark brown except some scales tipped with grayish white on outer surface, grayish yellow and flattened on inner surface; second segment grayish white apically, gradually broadened from base to middle, distal half almost uniformly slen- der; third segment yellowish white apically, about 2/3 length of second, gradually narrowed to pointed apex. Labial palpus in female distinctly narrower than in male, dark brown except some scales tipped with grayish white; second segment grayish white apically. Haustellum dark brown.

Thorax: Nota and tegula brown, scales tipped with grayish yellow. Forewing pale brown, scales tipped with grayish white, with scattered brown and dark brown scales; humeral patch dark brown; costa with a dark brown spot at basal 1/3, triangularly extending to upper margin of cell; discal, discocellular, plical, tornal and marginal spots dark brown; plical spot touching inner margin of discal spot anteriorly, widened to dorsum posteriorly; fringe grayish brown, intermixed with dark brown scales tipped with grayish white. Hindwing and fringe grayish brown at base, becoming darker to apex. Legs with dorsal surface grayish white; ventral surface dark brown, part scales tipped with grayish white; tibiae of mid- and hindlegs as well as each tarsomere of all tarsi grayish white apically.

Abdomen: Male genitalia ( Fig. 22 View FIGURES 21−23 ) with uncus wide at base, narrowed to basal 1/3, parallel-sided medially, triangularly narrowed from distal 1/3 to rounded apex, slightly curved ventrad, sparsely setose. Gnathos with posterior margin sub-triangularly produced, arched medially. Dorsal part of valva with costal process gradually widened to rounded apex, uniformly extending ventrad from costa to proximal flange, with a sclerotized ridge extending to base of proximal flange; proximal flange bearing long setae at base on ventral margin, membrane above proximal flange with dense microtrichiae and with spine-like setae on distal 2/3. Ventral part of valva with basal 3/5 broad, nearly parallel-sided, then narrowed to basal 4/5; distal 1/5 produced to a spine-like process, curving inward, setose; sacculus almost uniformly wide, setose on distal 2/3. Juxta a transverse band, membranous medially. Vinculum being a wide band. Phallus approximately 1.5 times length of valva, curved ventrad at basal 2/5, slightly curved dorsad at distal 1/5, basal 3/4 almost uniformly slender, distal 1/4 slightly narrower; internal sclerite curved; anellus bearing two short spine-like setae near base, with cone-like setae medially. Female genitalia ( Fig. 30 View FIGURES 27−30 ) with apophyses posteriores approximately 2.5 times length of apophyses anteriores. Eighth tergum with a darkly pigmented longitudinal median streak. Intersegmental membrane posterior to seventh segment with a sub-semicircular area of dense microtrichiae flanking ostium. Ostium bursae sunken circularly, about 1/3 width of posterior margin of seventh sternum. Seventh tergum nearly straight on posterior margin, with 3‒4 transverse, irregular rows of spine-like setae; sternum broadly concave in V-shape on posterior margin. Antrum membranous, broadly cup-shaped. Ductus bursae approximately 2.5 times length of corpus bursae; internal wall with overlapping platelets on anterior 2/5, becoming denser toward corpus bursae; ductus seminalis arising from ductus bursae proximal to antrum. Corpus bursae oval, with dense granules; signum arising from posterior 2/5 of corpus bursae, horn-shaped, with a sclerotized crescentshaped (from lateral view) basal plate.

Distribution. China (Hainan, Yunnan).

Etymology. The specific epithet is derived from the Latin edentulus (edentulous), referring to the absence of denticles on the posterior margin of the gnathos.