Chironomus entis Schobanov

Michailova, Paraskeva, 2024, Markers in the polytene chromosomes of freshwater Chironomus Meigen (Diptera, Chironomidae) species, Zootaxa 5453 (4), pp. 511-537 : 519

Chironomus entis Schobanov

The chromosome set is 2n = 8. The chromosomes AB,CD are metacentric, chromosome EF—submetacentric, chromosome G—telocentric. The centomere regions of all chromosomes are visable by distinct dark bands ( Fig. 7 ). Arm A4.4 has several homozygous inversion. Arm C2.2 formed by homozygous inversion, on which the “basic” sequences are near to the centromere region ( Fig. 7 ). The homologues of chromosome G are unpaired. Markers are the two BRs located to the NOR. After second BR there are several dark bands which can be used for species identification ( Fig. 7 ). Ten individuals were studied.

Collection sites: Plovdiv: fish pool.

Figures

FIGURE 7. Polytene chromosomes of Chironomus entis. 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.