[New Middle Eocene Porodiscidae from the Aralo-Turgai lowland and Kyzyl-Kum.] Lipman, R.Kh.[Ed]. [Fossil and Recent Radiolaria.], Akademiya Nauk SSSR, Leningrad, 1979: 74-78. Chapter pagination: 74-78. 75 [Zoological Record Volume 116]