* P. flavescens (Tullberg, 1871)

– Macrotoma flavescens Tullberg, 1871: 149

– Tomocerus arcticus Schött, 1893: 43

– Tomocerus americanus Schött, 1896: 172

– Tomocerus niger var. arcticus Folsom, 1902: 98

AK Folsom 1902 as niger var. arcticus; Weber 1950; Maynard 1951; Edwards 1972 all as arcticus; Christiansen & Bellinger 1980, 1998; Skidmore 1995; Babenko & Fjellberg 2006

YT Hammer 1953 as flavescens var. americanus

NT Hammer 1953 as flavescens var. americanus; Danks 1981 as flavescens arcticus; Skidmore 1995; Babenko & Fjellberg 2006

NU Mills & Richards 1953 as flavescens var. americanus; Babenko & Fjellberg 2006

BC Mills 1934; Spencer 1948; Battigelli & Marshall 1993; Setälä & Marshall 1994; Rusek & Marshall 1995; Setälä et al. 1995; Skidmore 1995; Cannings & Cannings 1997; Addison et al. 2003; Cannings 2010

AB Mills 1934; Powell 1971; Powell & Skaley 1975; Skidmore 1995; Lindo 2014

MB Bird 1930; Aitchison 1979, 1984, 1984a, 1984b, 1984c; Skidmore 1995; Lindo 2014

ON James 1933; Brown 1934; Mills 1934; Judd 1961, 1965, 1972; Martin 1965; Bird & Chatarpaul 1986; Peck 1988; Skidmore 1995

QC Marshall 1964, 1967; Skidmore 1995; Therrien et al. 1999, 1999a; Chagnon et al. 2000, 2001; Huebner et al 2012; Turnbull 2014

NS Mills 1934; Stach 1966 as flavescens separatus; Skidmore 1995

NF Arulnayagam 1995; Puvanendran et al. 1997

Remarks: Christiansen & Bellinger (1980, p. 1033) considered P. flavescens as a “polymorphic complex [which] does not segregate [in North America] into normal morphological species units”. Moreover, a modern combined morphological-molecular analysis demonstrated that P. flavescens, considered previously to occur over most of temperate North America, “probably does not exist naturally in the New World” (Park et al. 2011, p. 1).

General distribution: Palaearctic and Nearctic (?).

Unplaceable records of Pogonognathellus sp.:

BC Setälä & Marshall 1994; Setälä et al. 1995; Cannings 2010

AB Powell & Skaley 1975 (two species)