Ceratophysella palustris, (Muller, 1776)

Babenko, Anatoly, Stebaeva, Sophya & Turnbull, Matthew S., 2019, An updated checklist of Canadian and Alaskan Collembola, Zootaxa 4592 (1), pp. 1-125 : 72

I. palustris ( Müller, 1776)

– Podura palustris Müller, 1776: 184

AK Folsom 1919, 1937 as var. prasinus ; Weber 1950; Hurd & Lindquist 1958; Edwards 1972; Danks 1981; Skidmore 1995 NT Weber 1950; Hammer 1953; Danks 1981; Toda & Tanno 1983; Skidmore 1995

NU Wahlgren 1907; Folsom 1919, 1937 as var. prasinus ; Hammer 1953, 1953a; Oliver 1963; Danks & Byers 1972; Addison 1975, 1977; Ryan 1977; Danks 1980, 1981; Brodo 2000

BC Spencer 1948; Marshall et al. 1990; Skidmore 1995; Cannings 2010

MB Bird 1930 as palustris prasina; McClure 1943; Hammer 1953; Aitchison 1979; Skidmore 1995

ON James 1933 as palustris forma principalis, var. prasina , var. fucicola and var. balteata ; Folsom 1937 as var. prasinus ; Judd 1949; Skidmore 1995

QC Skidmore 1995; Therrien et al. 1999, 1999a; Chagnon et al. 2000, 2000a

NS Stach 1966; Skidmore 1995

Remarks: Christiansen & Bellinger (1980, p. 682) wrote that “most previous Nearctic records of I. palustris actually must be bimus or tricolor , though I. palustris probably occurs as an introduced form”. The same was stated by Fjellberg (1986, p. 2388): “Older arctic records of Isotomurus palustris (Müll.) are probably all Isotomurus tricolor ”. On the other hand, “ I. stuxbergi from Taimyr and specimens from Devon Island which were identified by Babenko (1994) as I. tricolor ( Packard, 1873) , are hardly separable” ( Babenko & Fjellberg 2006, p. 72). Specimens from Devon and Ellesmere Islands, having clearly ciliated setae, are more similar to I. palustroides Folsom than to I. tricolor as it was defined by Christiansen & Bellinger (1980). In other words, many, if not all of the above records are probably erroneous and much more study is necessary before a successful taxonomic revision of the Nearctic representatives of this genus can be made.

General distribution: unclear due to confusion with related species, described from Europe.