On independent species status of Paradoxornis polivanovi (Paradoxornithidae, Aves)

摘要

New inventory of collection materials led us to recognize that Paradoxornis polivanovi Stepanyan, 1974 has an independent species status. The supplementary evidence of the avove mentioned is provided using the concept of the Bergmann's rule for the group of forms heudei-polivanovi-mongoticus.