The first finding of the docodontan (a lower molar of Sibirotherium sp.) from the Bol’shoi Kemchug 3 locality (Ilek Formation, Lower Cretaceous) in Krasnoyarsk Territory is described. Sibirotherium rossicum, one of the youngest docodontans in the geological record, is known from the Ilek Formation of the Shestakovo 1 locality (Kemerovo Region). Previously, only indeterminable remains of docodontans had been found in the localities of the Ilek Formation (Bol’shoi Terekhtyul’ 2 and Bol’shoi Ilek) on Krasnoyarsk Territory.

中文翻译：

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西西伯利亚下白垩统 Docodontan (Mammaliaformes, Docodonta) 的新发现

描述了来自克拉斯诺亚尔斯克边疆区 Bol'shoi Kemchug 3 地区（下白垩纪 Ilek 组）的 docodontan（Sibirotherium sp. 的下臼齿）的首次发现。Sibirotherium rossicum 是地质记录中最年轻的 docodontans 之一，发现于 Shestakovo 1 地区（克麦罗沃地区）的 Ilek 组。此前，在克拉斯诺亚尔斯克边疆区的 Ilek 组（Bol'shoi Terekhtyul' 2 和 Bol'shoi Ilek）地区只发现了无法确定的齿齿鲨残骸。