Chironomus nuditarsis, Keyl, 1961

Michailova, Paraskeva, 2024, Markers in the polytene chromosomes of freshwater Chironomus Meigen (Diptera, Chironomidae) species, Zootaxa 5453 (4), pp. 511-537 : 520-521

Chironbomus nuditarsi s Strenzke

The species has a chromosome set 2n = 8. AB and CD chromosomes are metacentric, EF—submetacentric and G—telocentric ( Fig. 9 ). The centromere regions of all chromosome are very prominent. A marker the species are the three groups of dark bands in chromosomes G between which there are single light bands. In some individuals, a dark knob is found in the telomere of the G chromosome ( Kiknadze et al. 2006). The species is highly polymorphic with 16 inversion banding patterns ( Kiknadze et al. 2016). These authors reported for a heterozygous translocation between AB and EF chromosomes. Forty-five individuals were studied.

Collection sites: Russe: Mechka, fish pool, Sandanski: Lebniza, fish pool, Serdika River and Pasardjik, Saraj.

Figures

FIGURE 9. Polytene chromosomes of Chironomus nuditarsis. The numbers on the chromosome arms indicate the “basic”sequences.The large arrows show the localization of the centromere region. The small arrow on chromosome G indicates the marker sequences required for species identification. BR—Balbiani Ring, NOR—Nuclear Organizer Region. A, B, C, D, E, F, G—arms of the chromosomes. Scale bar, 10µm.