کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8916566 | 1642273 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Guiuva sashidai n. gen. n. sp., a probable colonial radiolaria from the Lopingian (Upper Permian) in South China
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فسیل شناسی
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چکیده انگلیسی
Guiuva sashidai Ito and Feng n. gen. n. sp., characterized by bunchy aggregations comprising combined small spherical shells with porous surfaces, was discovered from the Lopingian (Upper Permian) of the Yutouling section in the Xiaodong area, Guangxi Zhuang Autonomous Region, South China. The morphological similarities with recent radiolarians and formation of the aggregations imply that this species is a colonial radiolaria. This species is ca. 200 myr older than previously-reported occurrences of colonial radiolarians from the Eocene. It is believed that colonial radiolarians live exclusively in association with symbiotic algae, based on previous observations of the extant forms. Therefore, it is plausible to suggest that G. sashidai had symbionts, which would indicate that the origin of symbiont-bearing radiolarians dates back at least to the Permian. On this basis, we suggest that this is the oldest known example of symbiont-bearing radiolarians.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeoworld - Volume 26, Issue 4, December 2017, Pages 631-637
Journal: Palaeoworld - Volume 26, Issue 4, December 2017, Pages 631-637
نویسندگان
Tsuyoshi Ito, Lei Zhang, Mu-Hui Zhang, Qing-Lai Feng, Atsushi Matsuoka,