F. parvulus Stach, 1922

– Folsomides parvulus Stach, 1922: 17

– Folsomides americanus Denis, 1931: 126

– Folsomides parvus Folsom in Mills, 1934: 43

NT Hammer 1953 as parvus; Christiansen & Bellinger 1980 as americanus; Skidmore 1995 as americanus; Christiansen & Bellinger 1998; Babenko & Fjellberg 2006

BC Cannings 2010

AB Berg & Pawluk 1984; Skidmore 1995; Lindo 2014 all as americanus

MB Hammer 1953 as parvus; Mills & Sinha 1971; Christiansen & Bellinger 1980 as americanus; Skidmore 1995 as americanus; Christiansen & Bellinger 1998; Porco et al. 2014

ON Broadbent & Tomlin 1980 as parvus

QC Therrien et al. 1999, 1999a; Chagnon et al. 2000; Rochefort 2006

General distribution: cosmopolitan.