The chironomids (Diptera, Chironomidae) described by Lundström (1915) from arctic Siberia, with a redescription of Derotanypus sibiricus (Kruglova & Chernovskii) Author Saether, Ole A. text Zootaxa 2004 595 1 35 journal article 10.5281/zenodo.157906 1747e372-76a3-4a7d-b64c-fbbfa0b7e9c8 1175­5326 157906 4CE6F8B3-1872-4C00-886A-8FF1DCF1390C Procladius ( Holotanypus ) choreus (Meigen) sensu Pinder (1978) Tanypus choreus Meigen, 1804 : 23 . Tanypus culiciformis L. sensu Lundström (1915: 24) ,?not Linnaeus, 1767 . Material examined . RUSSIA : Chara­Ullach Mts. at Cape Chara­Ullach, 1 ɗ, 1 Ψ, 25 vii 1902 , M. I. Brussnew. In light of the results by Kobayashi (1998) , P. crassinervis and P. choreus both may be synonyms of a seasonally variable P. culiciformis , with P. c h o re u s as a short­heeled summer form. Another character used (e.g. by Roback 1971 and Pinder 1978 ) to distinguish P. culiciformis and P. c h o re u s the pigmentation of the abdominal tergites was not discussed by Kobayashi (1998) , but is possibly temperature­dependent as well, and thus may not be informative either.