Ancestreuma ryvkini (Shear, 1990)

Diplomaragna ryvkini Shear, 1990: 15, 14: figs 6–8. Diplomaragna ryvkini — Mikhaljova 1993: 25.

Diplomaragna longibrachiata — Mikhaljova 1993: 25.

Ancestreuma ryvkini — Mikhaljova 2000: 156; 2002: 204; Mikhaljova & Golovatch 2001: 109.

Remarks. Originally described in Diplomaragna (Shear 1990), this species has since been transferred to the restored Ancestreuma (Mikhaljova 2000) . The species is known from different regions of Siberia (Buryatia, Irkutsk Area, Republic of Tyva, Republic of Sakha (=Yakutia), Krasnoyarsk Province) as well as Mongolia (Khubsugul Lake, River Ongolich).

MAP 1. Distribution of Diplopoda species in Mongolia. Borderlines show borders between the aimaks. Filled diamond: Angarozonium amurense, filled square: Shearia longa sp. nov., open square: Asiatyla communicantis (Golovatch, 1977), filled triangle: Ancestreuma principale Golovatch, 1977, open triangle: Ancestreuma longibrachiatum (Shear, 1990), filled circle: Asiatyla ulykpani (Shear, 1990), open circle: Ancestreuma ryvkini (Shear, 1990), cross: Ancestreuma sardyk (Shear, 1990) .