3. Arctogeophilus sachalinus Verhoeff, 1934 *

Arctogeophilus sachalinus Verhoeff 1934: 15.

Arctogeophilus sachalinus - Takakuwa 1940: 135; Molodova 1973: 67; Kurcheva 1977: 45; Zalesskaja et al. 1982: 188; Ganin 1997: 121, 124, 126, 128, 134.

Type locality.

Russia: Sakhalin oblast: "Insel Sachalin" (Verhoeff 1934) = Sakhalin Isl.

Type series.

Holotype: male. Depository unknown.

Diagnosis.

A species of Arctogeophilus with first maxillary lappets relatively long; forcipular denticles only on the trochanteroprefemur and tarsungulum, not on the intermediate articles; 39 leg-bearing segments, possibly invariably; ventral pore-fields on some anterior segments; pretarsus of ultimate legs absent.

Distribution.

Far East: Sakhalin oblast (Sakhalin Isl.) (Verhoeff 1934; Takakuwa 1940; Molodova 1973; Kurcheva 1977; Ganin 1997), Maritime krai (Kurcheva 1977; Ganin 1997), and Chukotka autonomous okrug (Kurcheva 1977). Outside Asian Russia: no records.

Remarks.

It has been suggested that A. sachalinus could be a junior synonym of A. glacialis (Attems, 1909) (Nefediev et al. 2017a). More generally, the actual taxonomic status of the populations of Arctogeophilus from the Far East remains to clarify.