Abstract Field investigations of the Palaeogene sections exposed in Barmer district, Rajasthan (India) led to the discovery of a new fossiliferous horizon in the Padma Rao Open Cast Bentonitic Clay Quarry. The bentonitic clay sequence of this quarry is considered as representing the upper part of the shale, carbonaceous shale, lignite and bentonitic clay succession of the Akli Formation exposed in the Giral Lignite Mine, 2.5 km to its north. Screen-washing of the sediments from a fossiliferous level within the bentonitic clay of the new site has yielded nine taxa of sharks and batoids: Squatiscyllium nigeriensis White, 1934 , Ginglymostoma sokotoense White, 1934 , Ginglymostomatidae gen. et sp. indet., Brachycarcharias sp., Abdounia recticona Winkler, 1873 , Premontreia (Oxyscyllium) peypouqueti Noubhani et Cappetta, 1997 , Eotorpedo hilgendorfi Jaekel, 1904 , Coupatezia sp. cf. C. danica, and Myliobatidae gen. et sp. indet. The fauna recovered is mainly represented by nearshore shallow marine forms. This fauna is quite different from that of Palaeocene Fatehgarh Formation, the Lower Eocene Kapurdi Formation (Barmer Basin), the Khuiala Formation (Jaisalmer Basin) and the Cambay Shale (Cambay Basin), and favours a late Palaeocene (Thanetian) age for the upper part of the Akli Formation. A nearshore shallow marine palaeoenvironment is favored for the investigated stratigraphic horizon on the basis of the selachian fauna. Majority of the fossil shark species described from the Padma Rao quarry section are known from a number of sites in Africa, western Europe, Asia and southeastern USA, suggesting that free faunal interchanges were possible between the western Tethys and Indo-Madagascan faunal provinces during the late Palaeocene.

中文翻译：

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来自印度西部拉贾斯坦邦巴默地区古近系沉积物的新软骨鱼动物群：年龄、古环境和洲际亲缘关系

摘要 对在拉贾斯坦邦（印度）巴默地区出露的古近纪剖面进行实地调查，在 Padma Rao 露天膨润土采石场发现了一个新的化石层。该采石场的膨润土层序被认为代表了其北部 2.5 公里的 Giral 褐煤矿中出露的 Akli 组页岩、碳质页岩、褐煤和膨润土层序的上部。对新地点膨润土内化石层的沉积物进行筛网清洗，产生了九个鲨鱼和蝙蝠类群：Squatiscyllium nigeriensis White，1934 年，Ginglymostoma sokotoense White，1934 年，Ginglymostomatidae gen。等 sp. indet., Brachycarcharias sp., Abdounia recticona Winkler, 1873 , Premontreia (Oxyscyllium) peypouqueti Noubhani et Cappetta, 1997, Eotorpedo hilgendorfi Jaekel，1904 年，Coupatezia sp。参见 C. danica 和 Myliobatidae gen。等 sp. 插入。恢复的动物群主要以近岸浅海形态为代表。该动物群与古新世 Fatehgarh 组、下始新世 Kapurdi 组（Barmer 盆地）、Khuiala 组（Jaisalmer 盆地）和 Cambay 页岩（Cambay 盆地）有很大不同，并且有利于上古新世（Thanetian）晚期Akli 组的一部分。近岸浅海古环境有利于以鲨鱼动物群为基础的地层层位。在 Padma Rao 采石场部分描述的大多数化石鲨鱼物种来自非洲、西欧、亚洲和美国东南部的许多地点，