ABSTRACT

The Triassic record of modern sharks, rays, and skates (Elasmobranchii) is scattered and geographically biased towards the Northern Hemisphere and Europe in particular. Here, we report the first Triassic elasmobranch teeth from the Southern Hemisphere, originating from Norian strata of New Zealand. The teeth are few in numbers but relatively well preserved and indicate the presence of three different taxa, that all can be included in the extinct order Synechodontiformes. Different dental characters and combinations of characters suggest that the teeth represent previously undescribed species with apparently no close relatives in the Triassic elasmobranch record from the Northern Hemisphere.

摘要

现代鲨鱼、鳐鱼和鳐鱼（Elasmobranchii）的三叠纪记录是分散的，并且在地理上偏向于北半球，尤其是欧洲。在这里，我们报告了来自南半球的第一批三叠纪软骨鱼牙齿，起源于新西兰的诺里安地层。这些牙齿数量很少，但保存相对完好，表明存在三种不同的分类单元，所有这些分类单元都可以包含在已灭绝的集齿鱼目中。不同的牙齿特征和特征组合表明，这些牙齿代表了以前未描述过的物种，在北半球三叠纪软骨鱼记录中显然没有近亲。