Late Ordovician cephalopods from Morocco and their implications
Abstract The present paper describes the latest cephalopod fauna from the Upper Ordovician in the Anti-Atlas region, Morocco. Two species are reported herein belonging to two genera including one new species, Tafadnatoceras elfechtense sp. nov. and Isorthoceras sp.; the latter of which marks the fir...
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2025-07-01
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| Series: | Swiss Journal of Palaeontology |
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| Online Access: | https://doi.org/10.1186/s13358-025-00374-5 |
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| author | Xiang Fang Björn Kröger Kun Liang Qing Chen Jiaqi Song Lan Jiang Yaoyan He Chenggang Wang Xiongwei Zeng Hao Liu Kai Wei Fafu Wu Wenkun Qie |
| author_facet | Xiang Fang Björn Kröger Kun Liang Qing Chen Jiaqi Song Lan Jiang Yaoyan He Chenggang Wang Xiongwei Zeng Hao Liu Kai Wei Fafu Wu Wenkun Qie |
| author_sort | Xiang Fang |
| collection | DOAJ |
| description | Abstract The present paper describes the latest cephalopod fauna from the Upper Ordovician in the Anti-Atlas region, Morocco. Two species are reported herein belonging to two genera including one new species, Tafadnatoceras elfechtense sp. nov. and Isorthoceras sp.; the latter of which marks the first occurrence of the genus in Morocco. The discovery extends the distribution of late Katian cephalopod faunas globally, correlative with other high-latitude cephalopod faunas such as those from the Zagros region of Iran. After the evolutionary peak of the Great Ordovician Biodiversification Event in the Middle to early Late Ordovician, a marine ecosystem crisis led to a decline in biodiversity afterwards. Although the cephalopods continued to flourish in low-latitude regions, the palaeogeographic differentiation was observed in the Anti-Atlas region, where the faunas in the high-latitude region experienced a significant decline. The pattern aligns with the changes in the latitudinal diversity gradient from the Middle to Late Ordovician. Furthermore, the distributions of the cephalopod faunas in the Late Ordovician may have been influenced by the emergence of the high-latitude cold current. |
| format | Article |
| id | doaj-art-ac7b4e230ce947769f1d091e8832c732 |
| institution | Kabale University |
| issn | 1664-2376 1664-2384 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Swiss Journal of Palaeontology |
| spelling | doaj-art-ac7b4e230ce947769f1d091e8832c7322025-08-20T04:03:01ZengSpringerOpenSwiss Journal of Palaeontology1664-23761664-23842025-07-01144111110.1186/s13358-025-00374-5Late Ordovician cephalopods from Morocco and their implicationsXiang Fang0Björn Kröger1Kun Liang2Qing Chen3Jiaqi Song4Lan Jiang5Yaoyan He6Chenggang Wang7Xiongwei Zeng8Hao Liu9Kai Wei10Fafu Wu11Wenkun Qie12State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesFinnish Museum of Natural History, University of HelsinkiState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesWuhan Center, China Geological SurveyWuhan Center, China Geological SurveyWuhan Center, China Geological SurveyWuhan Center, China Geological SurveyWuhan Center, China Geological SurveyWuhan Center, China Geological SurveyState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of SciencesAbstract The present paper describes the latest cephalopod fauna from the Upper Ordovician in the Anti-Atlas region, Morocco. Two species are reported herein belonging to two genera including one new species, Tafadnatoceras elfechtense sp. nov. and Isorthoceras sp.; the latter of which marks the first occurrence of the genus in Morocco. The discovery extends the distribution of late Katian cephalopod faunas globally, correlative with other high-latitude cephalopod faunas such as those from the Zagros region of Iran. After the evolutionary peak of the Great Ordovician Biodiversification Event in the Middle to early Late Ordovician, a marine ecosystem crisis led to a decline in biodiversity afterwards. Although the cephalopods continued to flourish in low-latitude regions, the palaeogeographic differentiation was observed in the Anti-Atlas region, where the faunas in the high-latitude region experienced a significant decline. The pattern aligns with the changes in the latitudinal diversity gradient from the Middle to Late Ordovician. Furthermore, the distributions of the cephalopod faunas in the Late Ordovician may have been influenced by the emergence of the high-latitude cold current.https://doi.org/10.1186/s13358-025-00374-5Upper Tiouririne FormationKatianAnti-AtlasPalaeogeographyHigh-latitude cold current |
| spellingShingle | Xiang Fang Björn Kröger Kun Liang Qing Chen Jiaqi Song Lan Jiang Yaoyan He Chenggang Wang Xiongwei Zeng Hao Liu Kai Wei Fafu Wu Wenkun Qie Late Ordovician cephalopods from Morocco and their implications Swiss Journal of Palaeontology Upper Tiouririne Formation Katian Anti-Atlas Palaeogeography High-latitude cold current |
| title | Late Ordovician cephalopods from Morocco and their implications |
| title_full | Late Ordovician cephalopods from Morocco and their implications |
| title_fullStr | Late Ordovician cephalopods from Morocco and their implications |
| title_full_unstemmed | Late Ordovician cephalopods from Morocco and their implications |
| title_short | Late Ordovician cephalopods from Morocco and their implications |
| title_sort | late ordovician cephalopods from morocco and their implications |
| topic | Upper Tiouririne Formation Katian Anti-Atlas Palaeogeography High-latitude cold current |
| url | https://doi.org/10.1186/s13358-025-00374-5 |
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