– Isotoma agrelli Delamare Deboutteville, 1950: 43
AK MacLean et al. 1978; Christiansen & Bellinger 1980, 1998; Skidmore 1995
BC Battigelli & Marshall 1993; Rusek & Marshall 1995; Skidmore 1995; Cannings 2010
Remarks: The first published record of P. agrelli was that of MacLean et al. (1978) for Alaska with the remark “Fjellberg (research in progress)”. Potapov (2001, p. 380) considered this record as “doubtful” and it may belong to P. reducta, which is rather similar and numerous on the other side of Bering Strait (Babenko 2017).
General distribution: Europe and possibly North America.
P. cf. dichaeta (Yosii, 1969)
– Isotoma (Desoria) dichaeta Yosii, 1969: 551
NS Babenko, unpubl.
General distribution: Nearctic (?) and Eastern Palaearctic (Mongolia, Japan, Russian Far East).