On the synonymy of Dactylopisthoides Eskov, 1990 and Uusitaloia Marusik, Koponen & Danilov, 2001 (Araneae, Linyphiidae).

Two erigonine genera from East Siberia are synonymized: Uusitaloia Marusik, Koponen & Danilov, 2001, syn. nov. = Dactylopisthoides Eskov, 1990. Two new combinations are established: Dactylopisthoidestransbaicalicus (Marusik, Koponen & Danilov, 2001), comb. nov. and Dactylopisthoideswrangelianus (Marusik & Koponen, 2009), comb. nov. both ex. Uusitaloia . The epigyne of D.wrangelianus is illustrated for the first time. A new, updated diagnosis of Dactylopisthoides is proposed. The copulatory organs of both sexes of D.hyperboreus and D.wrangelianus are illustrated by SEM images.