Ripeacma sentosa 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 : 280-281

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Ripeacma sentosa Wang

sp. nov.

Ripeacma sentosa Wang , sp. nov.

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

Type material. CHINA: Holotype ♂, Guangxi: Huilongsi, Mao’ershan Reserves, Guilin (25.91°N, 110.47°E), 1376 m, 26.VII.2015, coll. Mujie Qi & Shengnan Zhao, genitalia slide No. LiSR15198. GoogleMaps

Diagnosis. This species is similar to R. scissignatha Wang & Li, 2001 and R. ventilatiformis sp. nov. in the male genitalia by sharing a distally expanded uncus and an approximately X-shaped gnathos. It can be separated from R. scissignatha by the uncus with distal 4/5 ovate; in R. scissignatha , the uncus is rhombic distally. The differences between sentosa sp. nov. and R. ventilatiformis sp. nov. are stated under the latter species.

Description. Adult ( Fig. 10 View FIGURES 5 – 10 ) with wing expanse 11.5 mm. Head pale yellow. Labial palpus in male yellow, mixed with black scales on dorsal surface. Antenna yellow, scape mixed with black scales, flagellum ringed with pale yellowish brown on dorsal surface. Thorax yellow, with scattered black scales; tegula black except posteriorly yellow. Forewing relatively broad, basal 3/4 subparallel, distal 1/4 triangular, narrowly rounded at apex; yellow, with black scales, denser distally; costal margin with a large inverted trapezoid black blotch from base to 1/3, extending to posterior 1/3 from dorsum, with a large inverted triangular black blotch from costal 1/2 to 3/4, its posterior margin blunt, extending to posterior 2/5 from dorsum; fold with a black spot at 2/3, loosely joined with right posterior corner of basal blotch from costal margin; dorsum with a black spot at base; apex with a large illdefined black spot, diffused along termen to tornus; cilia brown. Hind wing and cilia gray. Leg dominantly yellow; coxa and femur of foreleg mixed with blackish brown on ventral surface, tibia and tarsus blackish brown on outer surface except yellow at apex of each tarsomere; tibia of midleg blackish brown on outer surface, bearing a yellow streak at middle.

Male genitalia ( Fig 16 View FIGURES 11 – 16 ). Uncus well produced, gradually narrowed from base to 1/5, with a long seta laterally at basal 1/5; distal 4/5 broadly ovate, with fine spinules, with two setae at middle near posterior margin. Gnathos somewhat X-shaped, jointed and square-shaped at middle; lateral arms uniformly slender; ventral plate almost horizontally extending outward to pointed end, compressed, curved medially, pointed dorsad distally, with dense tiny spines on ventral surface. Valva slightly knife-shaped, gradually widened from base to bluntly truncate apex, with a loose tuft of stout setae in about basal 1/4, distal 3/4 with dense long hairs. Costa band-shaped, narrowed distally, reaching distal 1/4 of valva apically; transtilla expanded distally, more or less cup-like. Sacculus about 1/3 length of valva, sub-triangular, narrowed from base to 4/5, distal 1/5 narrowly uniform, sclerotized, apex truncate. Saccus thick digitate, narrowly pointed anteriorly. Juxta U-shaped, narrowly banded. Aedeagus slightly longer than half length of valva, expanded from base to 1/5, then slightly narrowed to pointed apex, with a triangular sclerite before apex.

Female unknown.

Distribution. China (Guangxi).

Etymology. The specific name is derived from the Latin sentosus, referring to the gnathos with dense tiny spines on ventral surface.













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