Mentum with 4th laterals barely reduced (type I), central tooth relatively tall with c2 teeth partly distinct (type IB-III).
Ventromental plates separated by about 21-27% of width of mentum, with about 39 - 40 striae. PE with about 17 - 19 teeth, including small interstitial teeth between some of the normal teeth.
Premandible with inner tooth about 1.7 - 2.5 times wider than the shorter outer tooth.
Antenna with A1 about 3.8 - 4 times longer than wide, Ring organ between a third and a half way up from the base of segment; AR about 1.25 - 1.5; relative lengths of antennal segments (µm) 112 : 41 : 10 : 14 : 7.
Mandible with third inner tooth hardly separated, but somewhat darkened (type I-IIB-C), and with about 12-15 furrows at the base.
Cytology: not known.
Found: Wisconsin - Why Not Bog Lake, County Road N, Vilas Co.
The presence of smaller interstitial teeth in the PE and of lateral tubules suggests that this is a species of Lobochironomus. The larger lateral tubules suggest it may be a previously unknown species, but it is possible that this is a polymorphism or an effect of environment. The mentum is similar to that described for C. mendax, but the second antennal segment is relatively longer.