Ripeacma lunata 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: 276-279

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Ripeacma lunata Wang

sp. nov.

Ripeacma lunata Wang   , sp. nov.

( Figs. 8 View FIGURES 5 – 10 , 14 View FIGURES 11 – 16 , 17 View FIGURES 17 – 18 )

Type material. CHINA: Holotype ♂, Guizhou: Daidong, Shuizu Town, Libo Country (25.41°N, 107.89°E), 720 m, 19.VII.2015, coll. Meiqing Yang & Ga-Eun Lee, genitalia slide No. LiSR16072 GoogleMaps   . Paratypes: Guizhou: 9♂, 1♀, same data as holotype, genitalia slide Nos. LiSR15135, LiSR15154, LiSR15186, LiSR15196, LiSR16054 GoogleMaps   ; 9♂, 3♀, Pobao, Shuizu Town, Libo Country (25.41°N, 107.89°E), 740 m, 20.VII.2015, coll. Meiqing Yang & Ga-Eun Lee, genitalia slide Nos. LiSR15126, LiSR15151. GoogleMaps  

Diagnosis. This new species is similar to R. angustizonalis   sp. nov.. It can be distinguished in the male genitalia by the uncus digitate, the gnathos anteromedially not curved backward, and the aedeagus not bilobed. In R. angustizonalis   sp. nov. the uncus is widened medially, the gnathos anteromedially curves backward, and the aedeagus is bilobed distally.

Description. Adult ( Fig. 8 View FIGURES 5 – 10 ) with wing expanse 13.0 – 15.0 mm. Head with frons yellow, vertex grayish brown. Labial palpus yellow; in male second segment dark brown on ventral surface and on dorsal surface of distal half; in female second and third segments with dense dark brown scales on ventral surface, third segment with sparse dark brown scales on dorsal surface. Antenna yellow on ventral surface, dark brown on dorsal surface. Thorax and tegula grayish brown. Forewing with costal margin gently arched, termen oblique; deep grayish brown; costal margin with an inverted triangular yellowish white spot at distal 1/5; discal and dicocellular as well as plical spots black, edged with pale yellow on outer margin; cilia black. Hindwing grayish brown, basal 3/5 yellowish white along costal area under forewing; cilia black along termen, brown along dorsal margin. Legs dominantly yellow; foreleg with femur and tibia grayish brown on ventral surface, tarsus blackish brown on outer surface except first tarsomere at base and apex and second tarsomere at apex yellow; mid- and hindlegs with tibiae blackish brown on outer surface, bearing a yellow streak at middle and apex respectively, hindleg with tarsus blackish brown on outer surface except yellow at apex of each tarsomere.

Male genitalia ( Fig. 14 View FIGURES 11 – 16 ). Uncus thick digitate, with long setae laterally and distally on dorsal surface. Gnathos a transverse band. Valva narrowed in basal 1/5, slightly widened from 1/5 to 4/5, then gradually narrowed toward blunt apex; with a short narrow linguiform process from basal 1/3 extending toward base, with stout setae on anterior margin and at apex. Costa banded, with stout setae basally, narrowed distally, not reaching end of valva; transtilla slightly widened distally, medially membranous, arched backward slightly. Sacculus about half length of valva, sub-triangular, gradually narrowed from base to pointed apex. Saccus short and broad, sub-triangular, bluntly rounded anteriorly. Juxta small, triangular; lateral lobes linear, reaching anterior to transtilla. Aedeagus about 1.2 times length of valva, gradually expanded from base to 1/2, narrowed from 1/2 to 2/3, then expanded for a short distance, and again narrowed toward rounded apex; wide sclerotized plate from distal 1/3, produced to a large hooked thorn distally, with a slender heavily sclerotized spine and a small curved hook at base.

Female genitalia ( Fig. 17 View FIGURES 17 – 18 ). Papillae anales short and broad, setose. Apophyses anteriores about 4/5 length of apophyses posteriores. Lamella postvaginalis crescent-shaped, with dense granules, with setae on posterior margin. Antrum with posterior half broadly banded, anterior half sub-triangular, sinuate along lateral and anterior margins. Ductus bursae membranous, uniformly scattered with small granules at junction between it and corpus bursae. Corpus bursae ovate; signum sub-ovate, with granules in area surrounding its base, with dense denticles on its surface, with one strong thorn anteriorly.

Distribution. China (Guizhou).

Etymology. The specific name is derived from the Latin lunatus, referring to the shape of the lamella postvaginalis.