New ichthyosaur remains from the Upper Jurassic of Antarctica, recovered from the Ameghino (=Nordenskjöld) Formation are described. These three new specimens represent the first unambiguous records of ichthyosaurs in this continent. Based on the morphology of the humerus, we refer one of the specimens to Ophthalmosauridae, the dominant ichthyosaur forms from the Middle Jurassic until the extinction of the group during the Late Cretaceous. In addition to the new Antarctic records, we re-evaluate ichthyosaur remains of two individuals from the Upper Jurassic of Madagascar and describe a third new specimen, which is the most complete ichthyosaur from this region of Gondwanaland. These findings provide new insights into the role of the seaways opened during the Jurassic in the dispersion of ichthyosaurs, particularly ophthalmosaurids. Antarctic and Malagasian ichthyosaurs bring additional support to the hypothesis of the Mozambique Corridor acting as a dispersal route connecting the Tethys Sea and the southern Pacific margins of Gondwana, at least since the Late Jurassic.

描述了南极上侏罗世的新鱼龙遗骸，是从Ameghino（=Nordenskjöld）组中回收的。这三个新标本代表了该大陆上鱼龙的第一个明确记录。根据肱骨的形态，我们将标本之一称为眼龙科，即从中侏罗纪到白垩纪末期灭绝的主要鱼龙类。除了新的南极记录，我们还重新评估了来自马达加斯加上侏罗统的两个个体的鱼龙遗骸，并描述了第三个新标本，这是冈瓦纳地区这一最完整的鱼龙。这些发现为侏罗纪时期开放的海道在鱼龙特别是眼龙科的扩散中的作用提供了新的见解。