Community and floristic characteristics of Larentiinae from Gansu Province

A total of 1870 specimens of Larentiinae were collected from Gansu Province during2006 and 2013. A total of 213 species and subspecies in 77 genera were identified,among which the Euphyia,15 species and subspecies were the new genera recorded in Gansu Province. Seven dominant genera such as Photoscotosia,Dysstroma,Rheumaptera,Xanthorhoe,Stamnodes,Eulithis and Epirrhoe including 58 species were observed,accounting for 9. 09% and,27. 23% in total genera and species,respectively. These results showed that the community structure of Larentiinae species in Gansu Province is complicated,and the species diversity is abundant,which shows the tendency that those in the middle( Londong and Gannan of Gansu Province) belong to the high levels and those in the two ends( Dingxi and Hexi of Gansu Province) belong to the relatively lower levels. Such distribution pattern is correlated with the local natural environment and climatic factors. The floristic characteristics of Larentiinae showed that 107 species or subspecies belonged to the Palaearctic Realm,accounting for 50. 23% in total collection; 21 belonged to the Oriental Realm,accounting for 9. 86%; and other 85( accounting for 39. 91%) exhibited transitional features,i. e.,the Palaearctic elements dominated in this study and had the transitional characteristics.