We report here three new elasmobranch fossil taxa from Thanetian–Lower Lutetian nearshore marine deposits of northeastern (Matam region) and central-western (Sine-Saloum region) Senegal. These three new taxa represent the oldest species of the enigmatical elasmobranch Odontorhytis, the oldest putative representatives of marine potamotrygonid, and an uncertain dasyatoid genus with the smallest grinding dentition ever described. These new taxa, representing the second Cenozoic elasmobranch remains formally described from Senegal, broaden our understanding of their evolutionary and biogeographic history in the equatorial Eastern Atlantic during this time period. Their occurrences confirm hypothesised stratigraphically correlations between the top of Matam Fm. and the base of Lam Lam Fm., refine the marine connections between these two Senegalese regions, and suggest that these genera were broadly distributed within the shallow marine settings of the equatorial Eastern Atlantic during latest Paleocene–early Middle Eocene.

我们在这里报告了塞内加尔东北部（马塔姆地区）和中西部（正弦-萨洛姆地区）的塔尼统-下卢特斯人近岸海洋沉积物中的三种新的弹枝化石分类群。这三个新的分类单元代表了谜样的弹毛O齿龙的最古老的物种，最古老的假定性代表是海洋波状角锥虫，以及不确定的菊科类，具有迄今为止描述过的最小的齿系。这些新的分类单元代表了塞内加尔的第二个新生代弹性支流，仍在塞内加尔进行了正式描述，拓宽了我们对其在这段时间内在赤道东大西洋的演化和生物地理历史的理解。它们的出现证实了Matam Fm顶部之间的假设地层相关性。以及Lam Lam Fm。的基地，完善了这两个塞内加尔地区之间的海洋联系，并表明这些属在最近的古新世至早中新世早期广泛分布在赤道东大西洋的浅海环境中。