Key words: Mammalia, Multituberculata, Djadochtatheriidae, Catopsbaatar, postcranial skeleton, sprawling posture, Cretaceous, Gobi Desert, Hermiin Tsav.

Jørn H. Hurum [j.h.hurum@nhm.uio.no], Naturhistorisk Museum, University of Oslo, Boks 1172 Blindern, N-0318 Oslo, Norway; Zofia Kielan-Jaworowska [zkielan@twarda.pan.pl], Instytut Paleobiologii PAN, ul. Twarda 51/55, PL-00-818 Warszawa, Poland;