Polypedilum

Saether, Ole A., Andersen, Trond, Pinho, Luiz C. & Mendes, Humberto F., 2010, The problems with Polypedilum Kieffer (Diptera: Chironomidae), with the description of Probolum subgen. n., Zootaxa 2497, pp. 1-36 : 14

Polypedilum subgenus Cerobregma Saether et Sundal

Polypedilum subgenus Cerobregma Saether et Sundal, 1999: 334 . Chironomini genus C Pinder et Reiss, 1986: 362.

Type species

Polypedilum (Cerobregma) ontario (Walley) Chironomus ontario Walley, 1926: 206 . Chironomus hirtipes Mitchell, 1908: 9 (preoccupied).

Diagnostic characters. The male imagines can be separated from those of other subgenera by having extremely long and strong, split setae along inner margin of gonostylus and gonocoxite with apicolateral bulblike extension with deep lateral incision between bulb and gonostylus.

The pupa is separable from that of other subgenera by the large cone-shaped cephalic tubercles, the large anal comb with numerous toothlets, the usual absence of anterior bands of stronger spinules on tergites and segments V and VI with all or some setae non-taeniate.

The larva is distinguished by the triangularly shaped head, unusually small mouth-parts, indistinct striae on the approximately triangular ventromental plates and median teeth of mentum of about equal height.