Nematinae

Subfamily Nematinae

Cladius pectinicornis (n = 6). All chromosomes of this species are clearly biarmed, i.e., submetacentric and subtelocentrics ( Fig. 1 View Figs 1–16 ). The first two chromosomes are substantially longer than the remaining ones.

* Euura clitellata (n = 9). As in the previous species, all chromosomes of E. clitellata are obviously biarmed, mostly being metacentric or submetacentric ( Fig. 2 View Figs 1–16 ). The first chromosome is about 1.5 times longer than the second one. Second to fourth, fifth to eighth and the ninth chromosomes represent three remaining size groups. On some metaphase plates, pericentromeric blocks of constitutive heterochromatin can be seen, with the largest one on the third submetacentric chromosome ( Fig. 3 View Figs 1–16 ).

* E. myosotidis (n = 8, 9). Most metaphase plates obtained from two individuals of this species clearly contain eight metacentrics or submetacentrics. All chromosomes show more or less continuous gradation in size, with the fifth metacentric being somewhat shorter than the fourth one ( Fig. 4 View Figs 1–16 ). However, all studied mitotic divisions from a particular embryo consistently demonstrate n = 9 with an additional acrocentric, which is of approximately the same length as the smallest metacentric ( Fig. 5 View Figs 1–16 ). In the embryo with n = 9 all chromosomes except for the above-mentioned acrocentric look virtually identical to those of the basic karyotype having n = 8.