The millipede genera Amblyiulus Silvestri, 1896 and Syrioiulus Verhoeff, 1914 in the Caucasus, with notes on their distributions (Diplopoda, Julida, Julidae).

In the Caucasus, the genera Amblyiulus Silvestri, 1896 and Syrioiulus Verhoeff, 1914 are shown to include two and four species, respectively: Amblyiulus georgicus Lohmander, 1932, from Georgia and Armenia, A. hirtus sp. nov., from Azerbaijan and Dagestan, Russia, Syrioiulus adsharicus (Lohmander, 1936), from Georgia, S. continentalis (Attems, 1903), from Azerbaijan and Iran, S. taliscius (Attems, 1927), from Azerbaijan, and S. armeniacus sp. nov., from Armenia. All these six species are described, illustrated, and keyed, and their distributions are mapped and discussed, based on the literature data and abundant new samples.