Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China
Upper lower Cambrian (provisional Cambrian Series 2) trilobites are described from three sections through the Shuangyingshan Formation in the Beishan area, northwestern Gansu Province, China. The trilobite fauna is dominated by eodiscoid and corynexochid trilobites, together representing at least te...
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| Format: | Article |
| Language: | English |
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Estonian Academy Publishers
2014-08-01
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| Series: | Estonian Journal of Earth Sciences |
| Subjects: | |
| Online Access: | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2014/issue_3/earth-2014-3-123-143.pdf |
| _version_ | 1819229399225991168 |
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| author | Jan Bergström† Zhou Zhiqiang Per Ahlberg Niklas Axheimer |
| author_facet | Jan Bergström† Zhou Zhiqiang Per Ahlberg Niklas Axheimer |
| author_sort | Jan Bergström† |
| collection | DOAJ |
| description | Upper lower Cambrian (provisional Cambrian Series 2) trilobites are described from three sections through the Shuangyingshan Formation in the Beishan area, northwestern Gansu Province, China. The trilobite fauna is dominated by eodiscoid and corynexochid trilobites, together representing at least ten genera: Serrodiscus, Tannudiscus, Calodiscus, Pagetides, Kootenia, Edelsteinaspis, Ptarmiganoides?, Politinella, Dinesus and Subeia. Eleven species are described, of which seven are identified with previously described taxa and four described under open nomenclature. The composition of the fauna suggests biogeographic affinity with Siberian rather than Gondwanan trilobite faunas, and the Cambrian Series 2 faunas described herein and from elsewhere in northwestern China seem to be indicative of the marginal areas of the Siberian palaeocontinent. This suggests that the Middle Tianshan–Beishan Terrane may have been located fairly close to Siberia during middle–late Cambrian Epoch 2. |
| first_indexed | 2024-12-23T11:12:33Z |
| format | Article |
| id | doaj.art-bead37f6ddba4b8fab8f6fc9c4480085 |
| institution | Directory Open Access Journal |
| issn | 1736-4728 1736-7557 |
| language | English |
| last_indexed | 2024-12-23T11:12:33Z |
| publishDate | 2014-08-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-bead37f6ddba4b8fab8f6fc9c44800852022-12-21T17:49:19ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572014-08-0163312314310.3176/earth.2014.1210.3176/earth.2014.12Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, ChinaJan Bergström†0Zhou Zhiqiang1Per Ahlberg2Niklas Axheimer3Department of Palaeozoology, Swedish Museum of Natural History, P.O. Box 5007, SE-104 05 Stockholm, SwedenXian Institute of Geology and Mineral Resources, 438 East You Yi Road, Xian 710054, Peoples Republic of China; zsy1940@163.comDepartment of Geology, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden; per.ahlberg@geol.lu.seDepartment of Geology, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden; niklas.axheimer@geol.lu.seUpper lower Cambrian (provisional Cambrian Series 2) trilobites are described from three sections through the Shuangyingshan Formation in the Beishan area, northwestern Gansu Province, China. The trilobite fauna is dominated by eodiscoid and corynexochid trilobites, together representing at least ten genera: Serrodiscus, Tannudiscus, Calodiscus, Pagetides, Kootenia, Edelsteinaspis, Ptarmiganoides?, Politinella, Dinesus and Subeia. Eleven species are described, of which seven are identified with previously described taxa and four described under open nomenclature. The composition of the fauna suggests biogeographic affinity with Siberian rather than Gondwanan trilobite faunas, and the Cambrian Series 2 faunas described herein and from elsewhere in northwestern China seem to be indicative of the marginal areas of the Siberian palaeocontinent. This suggests that the Middle Tianshan–Beishan Terrane may have been located fairly close to Siberia during middle–late Cambrian Epoch 2.http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2014/issue_3/earth-2014-3-123-143.pdfTrilobitataxonomypalaeobiogeographylower CambrianCambrian Series 2BeishanGansu ProvinceChina. |
| spellingShingle | Jan Bergström† Zhou Zhiqiang Per Ahlberg Niklas Axheimer Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China Estonian Journal of Earth Sciences Trilobita taxonomy palaeobiogeography lower Cambrian Cambrian Series 2 Beishan Gansu Province China. |
| title | Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China |
| title_full | Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China |
| title_fullStr | Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China |
| title_full_unstemmed | Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China |
| title_short | Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China |
| title_sort | upper lower cambrian provisional cambrian series 2 trilobites from northwestern gansu province china |
| topic | Trilobita taxonomy palaeobiogeography lower Cambrian Cambrian Series 2 Beishan Gansu Province China. |
| url | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2014/issue_3/earth-2014-3-123-143.pdf |
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