Markers in the polytene chromosomes of freshwater Chironomus Meigen (Diptera, Chironomidae) species Author Michailova, Paraskeva text Zootaxa 2024 2024-05-22 5453 4 511 537 http://dx.doi.org/10.11646/zootaxa.5360.3.8 journal article 10.11646/zootaxa.5453.4.3 1175-5326 11239735 B535A3FF-151C-4070-9BE7-2FE6E3238847 Chironomus dorsalis sensu Strenzke The chromosome set is 2n = 8.AE chromosome is submetacentric, CD and BF chromosomes are metacentric, G chromosome is telocentric ( Fig. 16 ). The centromere regions of all chromosomes are formed of thin dark bands. Chromosome G has two BRs and one NOR, near to the centromere region. On both sides of one BR there are double dark bands—a marker of the species ( Fig. 16 ).Ten larvae were analyzed. Collection sites : Sofia : Pancharevo Lake , Gornja Banij; Chepelare: fish pool .