کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4749930 1360625 2006 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rhipidognathid conodonts from the Early Ordovician Honghuayuan Formation of Guizhou, South China
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فسیل شناسی
پیش نمایش صفحه اول مقاله
Rhipidognathid conodonts from the Early Ordovician Honghuayuan Formation of Guizhou, South China
چکیده انگلیسی
The two oldest species of rhipidognathid conodonts, Rhipidognathus yichangensis and Bergstroemognathus extensus, are described and illustrated from the Early Ordovician Honghuayuan Formation of Guizhou, South China. Both species are interpreted to consist of a septimembrate apparatus. The form species Bergstroemognathus hubeiensis is regarded as a junior synonym of B. extensus. As currently defined, the multi-element species B. hubeiensis includes elements belonging to both B. extensus and R. yichangensis, and hence can no longer be regarded as a valid species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeoworld - Volume 15, Issue 2, May 2006, Pages 194-210
نویسندگان
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