A new crocodylomorph tooth assemblage from the Lower Member of the Douiret Formation (uppermost Jurassic–lowermost Cretaceous) in southeastern Tunisia is described. These teeth have been grouped into five morphotypes based on their diagnostic morphological features. The sample includes teeth, which have not been reported until now, such as non-Machimosaurini teleosauroid teeth, and labiolingually compressed tooth crowns with cutting edges devoid of serrations. Certain minor morphometric differences have been interpreted as ontogenetic or being possibly related to the position of the teeth in the jaws. Three trophic entities have subsequently been defined on the basis of the morphological characteristics of the teeth, and a possible niche partitioning between at least three crocodylomorph taxa is highlighted for the first time in the Tataouine Basin. On the other hand, the stratigraphic context of the Douiret Formation is thoroughly discussed in order to show how stratigraphic uncertainties could significantly impact previous attempts at reconstructing the macroevolutionary history of Crocodylomorpha. The latter should be treated with caution when the stratigraphic context of the fossil bearing formation remains a subject of debate.

描述了突尼斯东南部Douiret组下部（侏罗纪至白垩纪最低）的一种新的鳄形牙齿组合。这些牙齿已根据其诊断形态特征分为五种形态。该样本包括迄今为止尚未报道的牙齿，例如非Machimosaurini硬骨龙牙齿，以及切齿无锯齿的经唇舌压缩的牙冠。某些微小的形态差异已被解释为是个体发育的，或者可能与牙齿在颌骨中的位置有关。随后根据牙齿的形态特征定义了三个营养实体，Tataouine盆地首次首次强调了至少三个鳄形生物类群之间可能的生态位分配。另一方面，对Douiret组的地层背景进行了详尽的讨论，以显示地层的不确定性如何能够显着影响先前重建鳄形纲的宏观演化历史的尝试。当含化石的地层背景仍然是一个争论的话题时，应谨慎对待后者。