Larva: a medium sized salinarius-type. Gular region, frontoclypeus and often other parts of the head, darkened. Mentum of all specimens badly worn, but c2 teeth are well seperated (type II) and fourth laterals reduced.
Cytology
: 4 pairs of short chromosomes with the thummi arm
combination AB, CD, EF, G, but
Keyl pattern hard to recognise. Centromeres heavily
heterochromatic, often forming
a chromocentre.
Arm G often unpaired, with a nucleolus near the centromere and
possibly a Balbiani
ring near the other end. Polymorphic in arm A.
Polymorphism also occurs in arm
F, but only F2 is present at Ellesmere.
hypA1: 1 - 2c, 10 - 12, 3 - 2d, 9 - 4, 13 - 19
ie. as holomelas
I
hypA2: 1 - 2c, 10 - 12, 7 - 9, 2d -
3, 6 - 4, 13 - 19 (Greenland)
hypA3: 1 - 2c, 3 - 2d, 9 - 7, 12 -
10, 6 - 4, 13 - 19 (Ellesmere)
hypB1: as riihimakiensis
hypC1: 1-2c, 3-2d, 9-7, 12-10, 6-4, 13-19
(Wülker) or
1-6b,
11c-8, 15-11d, 6gh, 17a, 16h-a, 7d-a, 6f-c, 17b-22
(Kiknadze)
hypD1: 1 - 3, 11 - 18d, 7 - 4, 10 - 7e, 18g - 24
ie. as longistylus, tenuistylus, etc.
hypE1: 1 - 3e, 7 - 5, 8 - 10b, 4 - 3f, 10c - 13
hypF1: 1 - 6, 12 - 7, 13 - 23 (Greenland)
hypF2: 1 - 2, 14 - 13, 7 - 12, 6 -
3, 15 - 23
Found: North West
Territories - Hazen Camp Pond & Skeleton Lake, Hazen,
Ellesmere Island.
Greenland - Lake 517, Stoe Kvaneso.
Arctic lakes and pools.
Chromosomes pictured and briefly described by Wülker & Butler (1983), redescribed by Wülker & Martin (2000).