Chironomus 'annularius' sensu Strenzke?, 1959?

Chironomus annularius is attributed to Meigen 1818 (but may be a misspelling of Tipula annularis De Geer 1776, which is also a misidentification).
Redescribed by Strenzke (1959) but his material comprised more than one species.
Not surprisingly, then, material identified as C. annularius in the BOLD data base appears to comprise several species (Bolshakov, pers. comm.).  There is GenBank sequence for specimens from China which appears closely related to material from Finland and Germany, but the correct name and author attribution is unclear.  Spies and Sæther (2004) outlined the problems with the identity of specimens attributed to this species and recommended an author attribution referring to whose version of C. annularius is being used.  Since species with similar Barcode sequences also occur in Germany, it is likely that this is one of Strenzke's variants.

In BOLD Bin: BOLD:AAU4046.
The nearest neighbor Bin is BOLD:AAU4047 - also identified as C. annularius from Sweden and Finland - suggesting two different species are present in the Finnish material.

Adult:

"C. annularius" from BOLD Bin BOLD:AAU4046
ZMUO.026135+1468510234

Yellowish species, thoracic vittae and preepisternum dark brown, abdomen yellow with increasing brown saddle spots; legs yellow (tarsal segments may be darkened).

"C. annularius" from BOLD Bin BOLD:AAU4046
ZFMK_2587074+1499868020

Female: (based on above specimen from BOLD database)
Coloration basically as in male.  Tarsal segments darkekned; Fore femur/tibia about 1.

Pupa & fourth instar larva: No information.

Cytology: Some information on the polytene chromosomes of German material is given by Keyl and Keyl 1959 and Keyl 1962: Arm F contains the male determining gene(s), while there are nucleoli on arms C, E and G. Also large puff distal of the nucleolus on arm E.
annA1: 1 - 2c, 10 - 2h, 4d - 9, 2d-g, 4c-a, 13-19            as plumosus A1
annA2: 1 - 2c, 10 - 12a, 13ba, 4a-c, 2g-d, 9 - 4d, 2h - 3, 12cb, 13c - 19             as plumosusA2
annB1: Puff near middle of the arm with dark bands distal
annE1: 1 - 3e, 5 - 4h, 10b - 6, 4f - 3f, 10c - 13                   Inv 4g-6 from plumosus
annF1: 1 - 4b, 8c - 4c, 17 - 8d, 18 - 23                        as melanotus, anthracinus F1
annF2: 1 - 4b; 8c - 4c, 17 - 9c, 8ed, 18 - 23                   Inv 4c-8c from anthracinus F2
annG1: BR terminal on left end, nucleous about 1/3 from the other end, right end slightly heterochromatic.

DNA sequence:
MtCOI: As noted above there is sequence in GenBank and the BOLD database.