sentence: However , it differs from Deltatheridium in being much larger , upper molars with a more buccolingually expanded protoconal region and narrower stylar shelf , the absence of conules , M4 not significantly reduced , obliquely oriented p1 , and the larger size of the cuspule f on lower molars.Deltatheroides was also recovered from the Upper Cretaceous Djadokhta Formation of Mongolia ( Gregory & Simpson , 1926 ; Kielan-Jaworowska , 1975 ) .