Ripeacma ventilatiformis Wang

Li, Suran & Wang, Shuxia, 2017, Description of six new species of the genus Ripeacma (Lepidoptera: Oecophoridae) from China, with a checklist of the world species, Zootaxa 4268 (2), pp. 270-284 : 279-280

Ripeacma ventilatiformis Wang , sp. nov.

( Figs. 9 , 15 , 18 )

Type material. CHINA: Holotype ♂ , Hong Kong: Kadoorie Farm (22.43°N, 114.12°E), 210 m, 16.IV.2007, coll. Houhun Li et al., genitalia slide No. LiSR15168 . Paratypes: Hong Kong: 2♂, same data as holotype ; 1♂, same data as holotype except 12.IV.2007 ; 1♀, same data as holotype except 21.IV.2007, genitalia slide No. LiSR15169 ; 1♀, Kadoorie Farm (22.43°N, 114.12°E), 340-455 m, 14.IV.2007, coll. Houhun Li et al. ; 1♂, Dagangzai, Xigong (22.39°N, 114.30°E), 140 m, 15.IV.2007, coll. Houhun Li et al. ; 1♂, Nanyong (22.14°N, 113.51°E), 135-150 m, 18.IV.2007, coll. Houhun Li et al.; Hainan : 4♂, 1♀, Yinggeling (19.02°N, 109.33°E), 25-30.IX.2010, coll. Bingbing Hu, genitalia slide Nos. LiSR16030, HS15123 ; 8♂, 1♀, Lizudadian, Shuiman Town, Wuzhishan (18.88°N, 109.67°E), 766 m, 27-28.II.2016, coll. Qingyun Wang, Suran Li & Shengnan Zhao, genitalia slide No. LiSR16061 ; 1♀, Lizudadian, Shuiman Town, Wuzhishan (18.88°N, 109.67°E), 766 m, 7.VII.2015, coll. Qingyun Wang, Suran Li & Mengting Chen ; 3♂, 2♀, Lizudadian, Shuiman Town, Wuzhishan (18.88°N, 109.67°E), 766 m, 31.VII-1.VIII.2016, coll. Xia Bai, Shuonan Qian & Wanding Qi ; 24♂, 7♀, Wuzhishan Nature Reserves (18.90°N, 109.67°E), 738 m, 29.II-3.III.2016, coll. Qingyun Wang, Suran Li & Shengnan Zhao, genitalia slide No. LiSR16062 ; 5♂, Wuzhishan Nature Reserves (18.90°N, 109.67°E), 738 m, 28-30.VII.2016, coll. Xia Bai, Shuonan Qian & Wanding Qi, genitalia slide No. LiSR16162 ; 2♂, 1♀, Tianchi Jianfengling (18.73°N, 108.87°E), 787m, 8- 10.III.2016, coll. Qingyun Wang, Suran Li & Shengnan Zhao ; 4♂, Tianchi Jianfengling (18.73°N, 108.87°E), 787m, 13-17.VII.2015, coll. Qingyun Wang, Suran Li & Mengting Chen, genitalia slide No. LiSR16288 ; 1♂, Tianchi Jianfengling (18.73°N, 108.87°E), 787m, 7.VIII.2016, coll. Xia Bai, Shuonan Qian & Wanding Qi, genitalia slide No. LiSR16163 ; 2♂, 5♀, Hongkan, Yinggeling (19.08°N, 109.50°E), 540 m, 15-17.III.2016, coll. Qingyun Wang, Suran Li & Shengnan Zhao ; 2♂, Hongkan, Yinggeling (19.08°N, 109.50°E), 540 m, 20-21.I.2016, coll. Kaijian Teng, Xia Bai & Mengting Chen ; 2♀, Hongxin Village, Yuanmen Town, Baisha Country (19.07°N, 109.52°E), 445 m, 19-21.III.2016, coll. Qingyun Wang, Suran Li & Shengnan Zhao.

Diagnosis. This species is similar to R. scissignatha Wang & Li, 2001 and R. sentosa sp. nov. in the male genitalia by sharing a distally expanded uncus and an approximately X-shaped gnathos. It can be distinguished by the uncus fan-shaped in distal 3/4 and the gnathos produced outward and forming a sclerotized T-shaped ventral plate at each side. In R. s cissignatha, the uncus is rhombic distally, and the gnathos is produced outward and forms a distally sub-triangular ventral plate at each side; in R. sentosa sp. nov. the uncus is broadly ovate in distal 4/5, and the gnathos is produced outward and forms a medially curved ventral plate at each side.

Description. Adult ( Fig. 9 ) with wing expanse 12.0 – 15.0 mm. Head with frons yellowish white, vertex pale yellow. Labial palpus yellow; in male with scattered black scales; in female basal and second segments with scattered black scales, third segment about 4/5 length of second segment. Antenna with scape yellow, bearing black scales on dorsal surface; flagellum alternately yellow and yellowish brown. Thorax and tegula pale yellow. Forewing relatively broad, costal margin slightly arched, termen oblique; yellow, with scattered black scales; costal margin with a black spot at base; discal and discocellular spots black, distinct, the former larger; fold with black spot at base and 3/5 respectively; broad black fascia along termen, its inner margin sinuate; cilia black along termen, yellow along distal part of both costal margin and dorsum. Hindwing and cilia brown. Legs dominantly yellow; foreleg with femur and tibia blackish brown on ventral surface, tarsus with first tarsomere at middle as well as entire third and fourth tarsomeres blackish brown on outer surface; tibia of midleg mottled blackish brown on outer surface; tibia and tarsus of hindleg covered with a few blackish brown scales on outer surface.

Male genitalia ( Fig. 15 ). Uncus gradually narrowed from base to 1/4, distal 3/4 expanded, fan-shaped; with a seta at basal 1/5 laterally, with two teeth on posterior margin. Gnathos produced outward to form a sclerotized Tshaped process at each side, its horizontal basal stem slender, its transverse distal part slightly longer than basal part, narrowed to pointed ends; lateral arms thicker and shorter than basal stem of gnathos, combinated entirely on ventral surface. Valva narrowed at base, slightly widened to before narrowly rounded apex, more or less knife-like, with dense long hairs on distal 4/5. Costa thick, about 1/3 width of valva at base, distally attenuate; transtilla expanded distally. Sacculus about 1/4 length of valva, widened basally, gradually narrowed from base to 2/3, distal 1/3 hooked dorsad, pointed at apex. Saccus shorter than uncus, triangular, narrowly rounded anteriorly. Juxta broad U-shaped; lateral lobe concave inward at posterior 1/5 on outer margin, forming two short rounded processes. Aedeagus about 2/3 length of valva, narrower basally and medially, distal portion divided into two lobes: ventral lobe broad rectangular, dorsal lobe sub-ovate basally, digitate distally.

Female genitalia ( Fig. 18 ). Papillae anales somewhat rectangular, setose, bluntly round posteriorly. Apophyses anteriores 4/5 length of apophyses posteriores. Lamella postvaginalis with setae on posterior margin, shallowly concave at middle. Ostium bursae broad rectangular, lateral side sclerotized, triangularly produced toward ventral surface. Antrum short. Ductus bursae shorter than antrum, not distinctly separated from antrum. Corpus bursae narrower posteriorly, broadened anteriorly; signum narrow rectangular, with dense denticles, anteriorly with a large spine.

Distribution. China (Hainan, Hong Kong).

Etymology. The specific name is derived from the Latin ventilatus and the suffix - formis, referring to the uncus fan-shaped in distal 3/4.

Figures

FIGURES 5 – 10. Adults of Ripeacma spp. 5, R. rostratiformis sp. nov., holotype, ♂; 6, R. angustizonalis sp. nov., holotype, ♂; 7, R. fusoidea sp. nov., holotype, ♂; 8, R. lunata sp. nov., holotype, ♂; 9, R. ventilatiformis sp. nov., holotype, ♂; 10, R. sentosa sp. nov., holotype, ♂. Scales = 2.0 mm.

FIGURES 11 – 16. Male genitalia of Ripeacma spp. 11, R. rostratiformis sp. nov., holotype, genitalia slide No. LiSR 15246; 12, R. angustizonalis sp. nov., paratype, genitalia slide No. LiSR 16029; 13, R. fusoidea sp. nov., holotype, genitalia slide No. LiSR 15223; 14, R. lunata sp. nov., paratype, genitalia slide No. LiSR 15186; 15, R. ventilatiformis sp. nov., paratype, genitalia slide No. LiSR 16030; 16, R. sentosa sp. nov., holotype, genitalia slide No. LiSR 15198. Scales = 0.5 mm.

FIGURES 17 – 18. Female genitalia of Ripeacma spp. 17, R. lunata sp. nov., paratype, genitalia slide No. LiSR 15126; 18, R. ventilatiformis sp. nov., paratype, genitalia slide No. LiSR 15169. Scales = 0.5 mm.