Abstract:

The genus Xenozancla Warren, 1893 and its type-species X. vericolor are redescribed, and the diagnostic characters of the genus is given. Morphological characters of adult, including those of appearances of dorsal and ventral view, wing veins and genitalia, are figured; variations of male genitalia within species are discussed in detail and illustrated. Two new synonyms are proposed: Yinchie Yang 1978 as a new junior synonym of Xenozancla Warren 1893, and Yinchie zaohui Yang 1978 as a new junior synonym of Xenozancla versicolor Warren 1893 The lectotype is designated for X. versicolor Warren. The biogeographical features and distribution pattern of the genus are discussed on the basis of using mean propinquity and GIS methods. The results show that Xenozancla is endemic to eastern Asia. Its distributional area may be continuous from North China to Southwest China and India. Its distribution pattern should belong to South-East Asian tropical-subtropical type of the Oriental realm.

Key words: Geometridae, Geometrinae, Xenozancla, Yinchie, synonym, distribution pattern