Comparative Cytogenetics. 2008. 2(2): 121-125.
Karyotype analysis of five species of earthworms (Oligochaeta: Lumbricidae)
Kashmenskaya M.N., Polyakov A.V.
Abstract. Karyotypes of five species of earthworms from southeast edge of the West Siberian plain are described. Haploid chromosome sets of all species comprise of 18 bi-armed chromosomes. Four of these species, Eisenia atlavinyteae (Perel, Graphodatsky, 1984), Eisenia nordenskioldi (Eisen, 1879), Eisenia balatonica (Pop, 1943), and Aporrectodea caliginosa (Savigny, 1826) are diploid (2n=36, FN=72) and one, Octolasion lacteum (Örley, 1885) – triploid (3n=54, FN=108). Relative chromosome length and centromere index are presented.