Palaearctic Chelostoma bees of the subgenus Gyrodromella (Megachilidae, Osmiini): biology, taxonomy and key to species Author Müller, Andreas text Zootaxa 2015 3936 3 408 420 journal article 10.11646/zootaxa.3936.3.6 073d48e4-8e26-428b-b8cd-bac6a606fcbf 1175-5326 238286 9B737E02-FC85-4589-AA38-A3C18DEB6727 Chelostoma (Gyrodromella) orientale Schletterer, 1890 Chelostoma orientale Schletterer, 1890 : 236 . Type material: Holotype ♀, “Araxes-Thal” ( Armenia ), Natural History Museum Wien. New records. ARMENIA : Meghri, 17.6.– 20.6.2013 . Distribution. Known so far only from the type locality and southernmost Armenia . Host plants. Probably oligolectic on Campanula (Campanulaceae) and possibly also closely related genera (based on the microscopical analysis of 2 pollen loads from 2 different localities). Nesting biology. Unknown.