Life and death in a Late Cretaceous dune field, Nemegt basin, Mongolia

An Embryonic Oviraptorid (Dinosauria: Theropoda) from the Upper Cretaceous of Mongolia

“…The embryo (IGM 100/971) (figs. 1, 3, 4) was found at Xanadu (Norell, 1997a), a sublocality of the exceedingly rich Ukhaa Tolgod locality , Norell, 1997b, Loope et al, 1998 in south-central Mongolia ( fig. 2).…”

Correction: Furtive mating in female chimpanzees

“…We do not understand how an ornithurine with no 'shore bird' morphologies, from a dunefield 10 358-359 (1997). In this genetic analysis of a community of chimpanzees in the Taï forest, Côte d'Ivoire (carried out in 1994), we concluded that 7 out of 13 offspring were sired by males not found in the mother's social group.…”

Craniodental anatomy of a new late cretaceous multituberculate mammal from Udan Sayr, Mongolia.

“…The lithology of Udan Sayr is similar to that of the Djadochta and Barun Goyot formations (Gradziñski et al, 1977;Jerzykiewicz and Russell, 1991;Loope et al, 1998;Dashzeveg et al, 2005), and the environment is thought to be similarly arid and the age Campanian, likely late Campanian.…”

“…Similarly, in Mangasbaatar the middle ear cavity is surrounded only partially by bone and most of its ventral surface must have been enclosed by membrane; therefore it is hard to accept the same degree of stiffness in multituberculates than, for example, in desert dwelling rodents with large middle ear spaces enclosed by a bulla (Webster, 1966;Fleischer, 1973;Mason 2006Mason , 2013. Nevertheless, many of these recent mammals with large middle ear spaces (Mason, 2004;Mason, 2013) spend a substantial portion of their lives underground; the environmental conditions in Ukhaa Tolgod and most of the Late Cretaceous Mongolian sites seem to indicate that the environment was dominated by sands and some degree of periodical or seasonal aridity (Loope, 1998;Dingus et al, 2008). In this context, an enlarged, more rigidly enclosed middle ear region would be consistent with an optimization for the perception of low frequency sound by increasing the non-pliable surfaces surrounding the middle ear.…”

“…Tombaatar from Ukhaa Tolgod, a locality which is likely to be a Djadochta nearequivalent (Loope et al, 1998;Dingus et al, 2008). Obviously the faunas from (Webster, 1996).…”