Ripeacma angustizonalis 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: 274-276

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Ripeacma angustizonalis Wang

sp. nov.

Ripeacma angustizonalis Wang   , sp. nov.

( Figs. 6 View FIGURES 5 – 10 , 12 View FIGURES 11 – 16 )

Type material. CHINA: Holotype ♂, Guangxi: Mt. Lianhua, Dayaoshan Nature Reserves, Jinxiu (24.15°N, 110.11°E), 1000 m, 22.VII.2015, coll. Mujie Qi & Shengnan Zhao, genitalia slide No. LiSR16073 GoogleMaps   . Paratypes: Guangxi: 1♂, same data as holotype, genitalia slide No. LiSR16032 GoogleMaps   ; 1♂, Mt. Dayao, Jinxiu (24.14°N, 110.09°E), 823 m, 18.VII.2015, coll. Mujie Qi & Shengnan Zhao, genitalia slide No. LiSR16029; Guangdong GoogleMaps   : 1♂, Dawuling Nature Reserves, Xinyi City (22.35°N, 110.95°E), 1000 m, 10.VIII.2003, coll. Dandan Zhang, genitalia slide No. GoogleMaps  

LiSR16168; Hainan: 1 ♂, Bawangling (19.10°N, 109.11°E), Qiongchangjiang Country , 245 m, 7.V.2013, coll. Yinghui Sun, Wei Guan & Tengteng Liu, genitalia slide No. LiSR16243. GoogleMaps  

Diagnosis. This species is similar to R. umbellata Wang, 2009   in the male genitalia. The new species can be distinguished by the sacculus with the distal 1/5 produced to a spine and the elongate, triangular juxta. In R. umbellata   , the sacculus is finger-like in distal 1/3, and the juxta is ovate. The new species is superficially similar to R. setosa Wang, 2004   , but can be distinguished by the yellow frons, which is shining white in the latter species.

Description. Adult ( Fig. 6 View FIGURES 5 – 10 ) with wing expanse 11.0 – 12.5 mm. Head with frons yellow, vertex brown. Labial palpus in male yellow, second segment with distal 3/4 black on ventral surface. Antenna blackish brown on dorsal surface, yellow on ventral surface. Thorax and tegula dark brown. Forewing with costal margin slightly convex, termen oblique; blackish brown; costal margin with a pale yellow spot at distal 1/4; discal and discocellular as well as plical spots black; cilia black. Hindwing and cilia brown. Foreleg with first tarsomere at middle as well as entire third and fourth tarsomeres blackish brown on outer surface, remaining part yellow; mid- and hindlegs with coxae and femora yellow, tibiae and tarsi yellow on inner surface, tibiae blackish brown on outer surface, with a yellow streak at middle and apex respectively, tarsi blackish brown on outer surface except yellow at apex of each tarsomere.

Male genitalia ( Fig. 12 View FIGURES 11 – 16 ). Uncus wide at base, slightly narrowed to basal 1/4, widened from 1/4 to middle half, narrowed from middle to rounded and setose apex, setose lateromedially. Gnathos narrowly banded, anteromedially curved backward in a large semicircle; lateral arms narrow. Valva with basal 1/4 narrow, distal 3/4 elongate ovate; with a thumb-like process near ventral margin at basal 1/3, bearing strong setae along anterior margin and at apex. Costa broadly banded, distally narrowed, not reaching end of valva; transtilla oblique at apex. Sacculus less than half length of valva, broad at base, gradually narrowed to about 4/5, distal 1/5 produced to a spine. Saccus broad, sub-triangular, shorter than uncus. Juxta triangular; lateral lobes arising from anterior corner, slender, distally produced to a slender bar, reaching tegumen. Aedeagus slender, gradually widened from base to 1/ 3, uniform from 1/3 to 4/5; distal 1/5 bilobed: ventral lobe longer, slightly narrowed distally, round at apex, with a narrow plate from its middle bearing a small curved spine; dorsal lobe short, distally widened, concave at apex medially, forming two sub-elliptical processes.

Female unknown.

Distribution. China (Guangdong, Guangxi, Hainan).

Etymology. The specific name is derived from the Latin angustus and zonalis, referring to the narrowly banded gnathos.