C-banded mitotic metaphase of male complement of G. maculata (A), female G. immaculata (B), male G. furcata sp. n. (C) as well as both male (D, F, G) and female (E) of G. helleri sp. n. Arrows indicate biarmed chromosomes in G. furcata sp. n. (C). In G. helleri sp. n. the long polymorphic pair 2 shows three main karyomorphs in which homologous chromosomes differ in their morphology: both meta- or submetacentric (D, E), meta/submetacentric : acrocentric (F) and both acrocentric (G). X, sex chromosome. Scale bar = 10 µm.