Evolution aspects of Ellinaphididae and phylogeny relationship of new Early Cretaceous aphids from Bon-Tsagaan locality (Mongolia)

The paper presents descriptions of new aphid taxa from Early Cretaceous sediments of Bon-Tsagaan (Mongolia). Two new genera – Mongoaphis gen. n., Tsagaanaphis gen. n., and seven new species of the family Ellinaphididae ( Kania and Wegierek, 2008) are described. The newly described species are: Bugyrorinaphis bayana sp. n., Ellinaphis mediata sp. n., Ellinaphis stricta sp. n., Tsagaanaphis kinga sp. n., Mongoaphis maneta sp. n., Mongoaphis oblivia sp. n., Rinorectuaphis verita sp. n. Relationships among taxa of the extinct aphid family Ellinaphididae are explored using 37 morphological characters, representing the 11 genera. A key to species of Ellinaphididae is provided. The distributional and ecological pattern and the evolutionary aspects of Ellinaphididae are discussed. A comparison with the aphids of Ellinaphididae from Early Cretaceous Baissa deposits is mentioned.