文章基本信息

标题：New insight into the distribution and palaeobiology of the pycnodont fish Gyrodus
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作者：JÜRGEN KRIWET ; LARS SCHMITZ
期刊名称：Acta Palaeontologica Polonica
印刷版ISSN：0567-7920
电子版ISSN：1732-2421
出版年度：2005
卷号：50
期号：1
页码：49-56
语种：English
出版社：Institute of Paleobiology PAS
摘要：The pycnodont fish Gyrodus is reported for the first time from the Lower Cretaceous of Germany based on two lower jaw elements from the Hauterivian and Barremian. The stratigraphic and geographic distribution of Gyrodus is summarized. Gyrodus ranges from the Middle Jurassic to the Early Cretaceous making it one of the longest living pycnodonts. Unambiguous Late Cretaceous records of Gyrodus are still missing. Gyrodus displays its widest distribution and greatest taxonomic diversity in the Late Jurassic. The distribution of Gyrodus implies not only near-coastal mode of life but also a pelagic lifestyle conversely to most other pycnodonts. External body features and function of the unpaired fins support this interpretation.
关键词：Neopterygii;Pycnodontiformes;Gyrodus;Cretaceous;palaeobiogeography;Germany