Chironomus aprilinus Kieffer

Michailova, Paraskeva, 2024, Markers in the polytene chromosomes of freshwater Chironomus Meigen (Diptera, Chironomidae) species, Zootaxa 5453 (4), pp. 511-537 : 527

Chironomus aprilinus Kieffer

Chromosome set is 2n = 8. Chromosome AE is submetacentric, chromosomes CD, BF are metacentric, chromosome G is telocentric. Chromosome G has two BRs and one NOR, the last one is near to the centromere region of the chromosome ( Fig. 15 ). The “basic” sequences of arm A are in an inverted state in comparison of the standard species C. piger ( Fig. 15 ). In chromosome G between two dark block of bands there are several dark thin bands which can be used as a maker of the species ( Fig. 15 ). Thirteen individuals were studied.

Collection sites: Burgas: Atanasovsko Lake .

Figures

FIGURE 15. Polytene chromosomes of Chironomus aprilinus. 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.