Orencostoma Moriuti, 1971

Lou, Kang, Li, Juan & Wang, Shuxia, 2019, First report of the genus Orencostoma Moriuti (Lepidoptera: Yponomeutidae) from China, with descriptions of two new species, Zoological Systematics 44 (1), pp. 76-83 : 77

Genus Orencostoma Moriuti, 1971

Orencostoma Moriuti, 1971: 253 . Type species: Orencostoma bicornigerum Moriuti, 1971 .

Diagnosis. Orencostoma is similar to Ocnerostoma Zeller, 1847 , but differs in the uncus well-developed and the coremata absent in the male genitalia; the ductus bursae longer than the corpus bursae, entirely or partly with microspines or granules, and a signum present in the female genitalia. In Ocnerostoma , the male genitalia has the uncus ill-defined and the coremata present; the female genitalia has the smooth ductus bursae shorter than the corpus bursae and the signum absent.