Plagiorophus
It is known from the Middle Triassic Bukobay Formation ( Ladinian ) and Donguz Formation ( Anisian ) of Russia . 
<triplet> Middle Triassic <subj> Ladinian <obj> has part <subj> Anisian <obj> has part <triplet> Ladinian <subj> Middle Triassic <obj> part of <triplet> Donguz Formation <subj> Russia <obj> country <triplet> Anisian <subj> Middle Triassic <obj> part of