Proisotoma mackenziana, Hammer, 1953: 50

Stebaeva, Sophya, Lonsdale, Owen & Babenko, Anatoly, 2016, Catalogue of type materials of springtails (Hexapoda, Collembola) in the Canadian National Collection of Insects, Arachnids & Nematodes, Zootaxa 4088 (3), pp. 429-437 : 432

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).