Paleobiology of Late Cretaceous Decapod Crustaceans from James Ross Island, Antarctica

南极詹姆斯罗斯岛上发现了大量十足类甲壳类动物，这是从南部高纬度地区的巴雷米亚到坎帕尼亚时代岩石中首次发现这种化石动物群。这一时间跨度特别重要，因为此时在南极地区可能已经进化出几个有活着后代的属。这些藏品中还出现了新的分类群，这将使研究古生物学的几个方面成为可能。除了对新物种的描述和分类外，还可能确定至少两个物种的形态变异量，这两个物种现在被记录为存在于2000万年以上的时间跨度。目前，这些物种似乎几乎没有表现出随时间的变化。也有可能一些新的分类群将代表属内的创始人种，这些属后来变得更加广泛地分散。这些标本与从新西兰采集的标本相结合，将提供关于目前广泛分布于世界各地的一群多样化的深水十足类动物的早期历史的信息。

An extensive collection of decapod crustaceans was made on James Ross Island, Antarctica, which provides the first record of this fossil fauna from Baremmian into Campanian age rocks in the southern high latitudes. This time span is particularly important because several genera with living descendants may have evolved at this time in the Antarctic region. New taxa are also represented in the collections which will make it possible to examine several aspects of paleobiology. In addition to description and classification of the new species, it will be possible to determine the amount of morphological variation within at least two species that are now documented to have existed over a 20 million year time span. Currently these species seem to show remarkably little change with time. It is also probable that some of the new taxa will represent founder species within genera that have subsequently become more widely dispersed. These specimens, combined with those collected from New Zealand, will provide information on the early history of a diverse, deep water, group of decapods that are currently widely dispersed throughout the world.