Described as
Chironomus extremus Holmgren, 1869a: p. 40
Synonymy
Chironomus incertus Becher, 1886a: p. 63
Trichocladius curvinervis Kieffer, 1911a: p. 185 (a questionable synonymy)
Camptocladius incertas Lundström, 1915a: p. 15 (a questionable synonymy)
Trichocladius curvinervis var. polaris Kieffer in Kieffer and Thienemann, 1919a: p. 112 (a questionable synonymy)