Chironomus aberratus Keyl, 1961

Michailova, Paraskeva, 2024, Markers in the polytene chromosomes of freshwater Chironomus Meigen (Diptera, Chironomidae) species, Zootaxa 5453 (4), pp. 511-537 : 513

Chironomus aberratus Keyl

Chromosome set of the species is 2n = 8. Chromosomes AB, CD are metacentric, EF—submetacentric and G— telocentric. The “basic” sequences are located on the same part of the chromosome arms as that of C. piger ( Fig.2 ). The centromere regions of the chromosomes occur as dark, large prominent bands with exception of a centromere region of chromosome G ( Fig. 2 ). Chromosome G is very small and has one NOR and one BR. The marker of the chromosome is the two dark bands between which there are several lighter ones ( Fig.2 ). A slightly polymorphous species ( Michailova 1989). Five individuals were studied.

Collection sites: Varna, Sofia: South Part , larvae found in temporary water basin .

Figures

FIGURE 2. Polytene chromosomes of Chironomus aberratus. 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.