کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4746737 1642062 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new species of the Late Cretaceous ‘sail-finned’ bony fish, Pentanogmius (Actinopterygii: Tselfatiiformes), from Texas, USA
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فسیل شناسی
پیش نمایش صفحه اول مقاله
A new species of the Late Cretaceous ‘sail-finned’ bony fish, Pentanogmius (Actinopterygii: Tselfatiiformes), from Texas, USA
چکیده انگلیسی

Pentanogmius Taverne (Actinopterygii: Tselfatiiformes) is a Late Cretaceous bony fish. Here, the diagnosis for the genus is emended and a new species, P. fritschi sp. nov., described. The new species is based on a nearly complete skeleton from the Britton Formation (upper Cenomanian–lower Turonian) of the Eagle Ford Shale in Dallas County, Texas, USA. The skeleton measures about 1.7 m in total length and represents the sole Cenomanian–Turonian example of Pentanogmius in North America. The most peculiar aspect of this new species is the morphology of the dorsal fin in which its anterior one-third is elongate to form a ‘hook-shaped sail.’ Pentanogmius fritschi sp. nov. was likely an active swimmer in open ocean environments that possibly fed opportunistically on a variety of relatively small pelagic fishes and invertebrates. The present stratigraphic record and anatomical evidence indicate the following phylogenetic hypothesis among the three North American Pentanogmius species: [P. fritschi sp. nov. [P. evolutus + P. crieleyi]].

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cretaceous Research - Volume 61, June 2016, Pages 188–198
نویسندگان
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