– Isotoma notabilis f. pallida Agrell, 1939: 1
– Isotoma ekmani Fjellberg, 1977: 9
AK Christiansen & Bellinger 1980, 1998; Skidmore 1995
NT Hammer 1953 as notabilis var. pallida; Rusek 1994; Skidmore 1995
NU Hammer 1953; Addison 1975, 1977; Ryan 1977 all as notabilis var. pallida; Danks 1981 as notabilis; Fjellberg 1986, 1994; Babenko 1993, 1994a; Chernov 2004
BC Battigelli & Marshall 1993; Setälä & Marshall 1994; Rusek & Marshall 1995; Skidmore 1995; Addison et al. 2003; Cannings 2010
AB Parsons & Parkinson 1986, 1986a; Skidmore 1995; Lindo 2014
MB Mills 1934; McClure 1943 both as binoculata; Hammer 1953 as notabilis var. pallida; Aitchison 1984, 1984c; Porco et al. 2014
ON Bird & Chatarpaul 1986; Skidmore 1995
QC Therrien et al. 1999, 1999a; Chagnon et al. 2000, 2000a, 2001, 2001a
NS Babenko, unpubl.
NF Arulnayagam 1995; Puvanendran et al. 1997
Remarks: Mills’s record (1934) of Isotoma binoculata Axelson, 1903, was based on McClure’s collection from the vicinity of Churchill, MB. This species, now known as Cryptopygus binoculatus, was recently found in Michigan, USA (Bernard & Snider 1994). Nevertheless, Canadian and earlier Nearctic records probably belong to ekmani (Christiansen & Bellinger 1980, p. 611).
General distribution: Holarctic.