Polytene chromosome complement of C. (Chaetolabis) atroviridis
Keyl arms relatively easily identifiable, as labelled.  N - nucleolus; BR - Balbiani ring; arrowheads - centromeres

Inversion polymorphism of C. (Chaetolabis) atroviridis
a. heterozygote for arm A; b. heterozygote for arm C; c. alternative homozygous sequences for arm D; e. heterozygote for arm F.

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