Danzig, E.M. 1966 The reduction of wax-secreting dermal structures of the females of Pulvinaria Targ. (Homoptera, Coccoidea) infested by parasites.. Zoologicheskii Zhurnal 45: 1488-1492.

Notes: P. crassispina n. sp. and P. aestivalis n. sp. (in litt.) nomen nudum; discusses differences between parasitized and unparasitized specimens of P. betulae.