Abstract Bulk sampling and surface collecting of two glauconitic horizons located in Southern Togo yielded a diverse elasmobranch fauna described here. This fauna includes 30 species dominated by carcharhiniforms (eleven species), myliobatiforms (nine species) and lamniforms (five species); it also comprises three orectolobiforms, whereas the squatiniforms and rhinopristiforms are represented by one species each. Although the poor preservation of the specimens hampered numerous species-level identifications, the vast majority of taxa identified were formerly reported from the Paleocene–Ypresian interval, four of which being exclusively known from the upper Paleocene. This, along with the six associated benthic foraminifera species, indicates a late Thanetian age for the sampled horizons and provide age constraints on a geographically widespread benchmark horizon in Western Africa. The composition of the elasmobranch assemblage shows strong resemblances with upper Paleocene faunas from Morocco and differs markedly from known assemblages from geographically closer localities in Niger and Nigeria, which suggests strong palaeoenvironmental control on the distribution of Thanetian elasmobranch diversity.

中文翻译：

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来自多哥上古新世的薄鳃亚目

摘要 位于多哥南部的两个青海岩层的批量采样和表面收集产生了这里描述的多样化的弹鳃动物群。该动物群包括 30 种，主要是鱼形目（11 种）、弓形目（9 种）和板状目（5 种）；它还包括三个orectolobiforms，而squatiniforms 和rhinopristiforms 各有一个物种。尽管标本保存不佳阻碍了许多物种级别的鉴定，但已鉴定的绝大多数分类群以前报告过来自古新世 - 伊普鲁斯时期，其中四个完全来自上古新世。这与六种相关的底栖有孔虫物种一起，表明采样地平线的塔内特时代晚期，并为西非地理上广泛的基准地平线提供了年龄限制。棘鳃类动物群的组成与来自摩洛哥的上古新世动物群有很强的相似性，并且与来自尼日尔和尼日利亚地理上较近的地方的已知动物群显着不同，这表明对塔内提州棘鳃类动物多样性的分布有很强的古环境控制。