An unusual dicynodont specimen from the historical collection of von Huene and Stahlecker (1928/1929) is described from the Middle Triassic Dinodontosaurus Assemblage Zone of the Santa Maria Formation of Chiniquá, Rio Grande do Sul, Brazil. Hitherto only two dicynodont species, the stahleckeriid Stahleckeria potens and the more basal kannemeyeriiform Dinodontosaurus turpior, were recorded from this faunal assemblage. The specimen consists of an isolated partial brain case and intertemporal skull roof, a left nasal and a preparietal. In contrast to Stahleckeria, a preparietal is present, the intertemporal skull roof is extremely narrow and the postorbitals are short posteriorly. In contrast to Dinodontosaurus, the interparietal is narrow and intrudes far onto the intertemporal skull roof, the tabular is separately ossified and the entire intertemporal region is extremely narrow. The form represents a rare, hitherto unrecorded component of the fauna. Comparison to other known Middle Triassic dicynodonts shows that it cannot be referred to any known taxon, showing a unique combination of characters. Close resemblance is found to some other South American taxa, particularly to Jachaleria candelariensis from the Riograndia Assemblage Zone of the Caturrita Formation.

巴西南里奥格兰德州奇尼夸的圣玛丽亚组的中三叠世恐龙齿龙集聚区描述了冯·休内和斯塔勒克（1928/1929）的历史收藏中的一个不寻常的双齿龙标本。迄今为止，从该动物群中只记录到两个双齿类物种，即：stahleckeriid Stahleckeria potens和更基生的Kannemeyeriiform Dinodontosaurus turpior。标本包括一个孤立的部分脑箱和颞间颅骨顶，左鼻和前壁。与Stahleckeria相比，前壁是存在的，颞间颅骨顶极窄，眼眶后部较短。与恐龙龙相反，顶间狭窄，并侵入到颞间颅骨顶上，平板状骨化，整个颞间区域非常狭窄。这种形式代表了该动物迄今为止罕见的未记录成分。与其他已知的中三叠纪双齿齿龙的比较表明，它不能被称为任何已知的分类单元，显示出字符的独特组合。发现与南美其他一些类群非常相似，特别是与来自Caturrita组的Riograndia组合带的Candelariensis Jachaleria。