Catalogue of type materials of springtails (Hexapoda, Collembola) in the Canadian National Collection of Insects, Arachnids & Nematodes Author Stebaeva, Sophya Author Lonsdale, Owen Author Babenko, Anatoly text Zootaxa 2016 4088 3 429 437 journal article 51625 10.5281/zenodo.267103 becfe9b0-4869-4739-90e7-1abd2c2093d7 1175-5326 267103 76FD18F5-B9BC-4E17-8E7B-AAC01480847C mackenziana Hammer, 1953: 50 . Proisotoma . Holotype: 1 (slide, mounted together with 4 specimens of two species of Onychiuridae ) Canada. [Northwest Territories], Reindeer St[ation], 164, [9–18.vi.]1948, [on the bank of the Mackenzie river in wet recently deposited ooze with a little dead leaves and sparse moss], M. Hammer (CNC 165117). Christiansen & Bellinger (1980–1981: 572) considered that “this specimen is immature and probably does not belong in the genus Proisotoma . Listed as Isotoma mackenziana (Hammer, 1953) by Fjellberg (2003: 96).