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Sixty-six specimens of the earthworm    Drawida   ghilarovi    Gates, 1969 (  Oligochaeta  ,   Moniligastridae  ) from 15 localities of the southern Russian Far East were studied cytogenetically. We examined chromosome sets during mitosis and diakinesis as well as DNA content in the spermatogenous and somatic cell nuclei. The populations and morphs displayed no differences in karyotype and ploidy levels estimated in terms of both chromosome number and DNA mass index: n = 10, 2n = 20; c = 1.1 pg, 2c = 2.2 pg. We conclude that polyploidy as a species- or race-forming factor is not typical of these earthworms.

comparative cytogenetics

Cytogenetic description of the earthworm    Drawida   ghilarovi    Gates, 1969 (  Oligochaeta  ,   Moniligastridae  ) from the southern Russian Far East