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 luridus Srenzke The chromosome set is 2n = 8. Chromosome AE is submetacentric, chromosomes CD and BF are metacentric, chromosome G is telocentric. Near to the centromere region of chromosome G there is puff. Two BRs are close to each other. In the middle of the chromosome G there is a constriction surrounded by thick dark bands, a marker of the species ( Fig. 17 ). The “basic” patterns in A2.2 are in inverted state in comparison with the standard species, C. piger . Twenty-two larvae were analyzed . Collection sites : Sofia : South Park ; Varna , region St. Konstantin and Elena .