Chironomus sp. Kisumu

Wuelker, Wolfgang F., Kiknadze, I. I. & Istomina, A. G., 2011, Karyotypes of Chironomus Meigen (Diptera: Chironomidae) species from Africa, Comparative Cytogenetics 1, pp. 23-46 : 31-34

Chironomus sp. Kisumu

Karyotype

(Fig. 6a). Haploid number n=4, arm combination AC BF DE G ( “parathummi” cytocomplex), centromeric bands not heterochromatinized, nucleoli in arms E and G, Balbiani rings in arms B and G. Chromosomal polymorphism was not recorded.

Banding sequences (Fig. 6b-f)

Arm A (Fig. 6b) has the sequence kisA1, formed by 3 inversion steps from pigST.

Arm C (Fig. 6c) has the sequence kisC1, formed by 8 inversion steps from pigST.

Arm D (Fig. 6d) has the sequence kisD1, formed by 6 inversion steps from Chironomus piger ST:

Arm E (Fig. 6e) has the sequence kisE1, formed by two inversion steps from Chironomus piger ST

Presence of a nucleolus in region 13 in arm E is a great characteristic of the Chironomus sp. Kisumu karyotype.

Arm B (Fig. 6a) not mapped. It has one sequence - kisB1. The common BR is well developed.

Arm F (Fig. 6f) has the sequence kisF1. It was mapped only fragmentarily because of complex inversions in comparison with Chironomus piger ST. The presence of a large Balbiani ring situated just near the centromeric band is a characteristic of arm F in the Chironomus sp. Kisumu karyotype. There is pericentric inversion in the chromosome BF (Fig. 6a, f).

Arm G (Fig. 6a) is longer than usual in Chironomus species. There is a nucleolus and four Balbiani Rings on arm G. One of Balbiani Rings, noted by the black dot in Fig. 6a, was developed only in some cells of the salivary gland cells.

In total, seven Ethiopian endemic banding sequences are found in the sequence pool of Chironomus sp. Kisumu. All these sequences differ from Chironomus parathummi Keyl, 1961 sequences.

Larva:

long tubuli laterales on abdominal segment VII.

Distribution:

near Victoria lake, Kenya.