An updated checklist of Canadian and Alaskan Collembola Author Babenko, Anatoly Author Stebaeva, Sophya Author Turnbull, Matthew S. text Zootaxa 2019 2019-05-02 4592 1 1 125 journal article 26934 10.11646/zootaxa.4592.1.1 e5152ce0-a14b-4e7a-a676-26b4765bc49c 1175-5326 2656929 B6FF005C-D0AA-4532-8ACC-43D3DED984EF I. tricolor ( Packard, 1873 ) Isotoma tricolor Packard, 1873: 34 NU Fjellberg 1986 ; Babenko 1993 , 1994a ; Babenko & Bulavintsev 1993 , 1997 ; Niwranski et al. 2002 ; Chernov 2004 ON Christiansen & Bellinger 1980 , 1998 ; Skidmore 1995 Remarks: Records of I. tricolor and I. stuxbergi from northern Canada very likely belong to a single morphological form (see remarks on I. palustris ). General distribution: Nearctic. Unplaceable records of Isotomurus sp.: NU Hogg & Hebert 2004 , cf. palustroides / stuxbergi MB McClure 1943 as I. retardatus Folsom, 1937 (considered “problematic” by Christiansen & Bellinger 1998 , p. 754) NF Arulnayagam 1995