KMS Nanjing Institute of Geology and Palaeonotology,CAS
The Proterozoic macrofossil Tawuia as a coenocytic eukaryote and a possible macroalga | |
Tang, Qing1,2,3; Pang, Ke(庞科)4,5,6; Li, Guangjin(李光金)4,5,7; Chen, Lei7; Yuan, Xunlai(袁训来)4,5,6,9; Sharma, Mukund8; Xiao, Shuhai2,3 | |
2021-08-15 | |
发表期刊 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY |
ISSN | 0031-0182 |
卷号 | 576页码:15 |
摘要 | Proterozoic carbonaceous macrofossils are key to understand the evolution of early eukaryotes and how they acquired macroscopic sizes. However, phylogenetic interpretation of these macrofossils is challenging because most of them are morphologically simple and lack phylogenetically diagnostic features. Among Proterozoic carbonaceous macmfossils, the tomaculate fossil Tawuia is relatively rich in characters and is common in Proterozoic successions. However, its phylogenetic interpretation is uncertain and Tawuia has been variously interpreted as a bacterium or an alga (photosynthetic eukaryote), in part because certain aspects of its morphologies have not been consistently documented, hampering their functional interpretations. Here we report exceptionally preserved Tawuia specimens from the Tonian Liulaobei and Shiwangzhuang formations in North China. These fossils show that Tawuia is a tomaculate organism, sometimes with an axial stripe, terminal discoidal structures, and transverse constrictions, features that were previously documented but variously interpreted. We infer that Tawuia was a coenocytic organism with recalcitrant cell walls, asexual reproduction through asymmetric constrictions, and possible abscission structures. These features indicate that Tawuia is probably a coenocytic eukaryote, and possibly a macroalga, although more evidence is needed to confirm these interpretations, particularly the photosynthetic nature of Tawuia. A literature review reveals that the key features described here occur not only in many Tonian Tawuia specimens, but also in some possible Mesopmterozoic Tawuia fossils as much as ca. 1.6 Ga old. The new data and interpretations of Tawuia presented here provide important constraints on the origin and early evolution of coenocytic eukaryotes, primary plastids, and macroalgae, particularly if the Mesopmterozoic Tawuia fossils are confirmed as macroalgae. |
关键词 | Proterozoic Carbonaceous macrofossil Tawuia Coenocytic macroalga |
DOI | 10.1016/j.palaeo.2021.110485 |
收录类别 | SCI |
语种 | 英语 |
关键词[WOS] | ORGANIC-WALLED MICROFOSSILS ; NORTH CHINA CRATON ; CARBONACEOUS COMPRESSION FOSSILS ; VINDHYAN SUPERGROUP ; MACKENZIE MOUNTAINS ; CHLOROPHYTA ; ALGA ; PALEOBIOLOGY ; SUCCESSIONS ; MORPHOLOGY |
资助项目 | NASA Exobiology Program[80NSSC18K1086] ; Paleontological Society ; Geological Society of America ; National Natural Science Foundation of China[41921002] ; National Natural Science Foundation of China[41602007] ; Youth Innovation Promotion Association CAS[2021307] ; Science Foundation of Jiangsu Province of China[BK20161090] ; State Key Laboratory of Palaeobiology and Stratigraphy[193126] ; State Key Laboratory of Palaeobiology and Stratigraphy[20201102] ; State Key Laboratory of Palaeobiology and Stratigraphy[20162109] |
WOS研究方向 | Physical Geography ; Geology ; Paleontology |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
WOS记录号 | WOS:000668458200001 |
项目资助者 | NASA Exobiology Program ; Paleontological Society ; Geological Society of America ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Science Foundation of Jiangsu Province of China ; State Key Laboratory of Palaeobiology and Stratigraphy |
出版者 | ELSEVIER |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/38463 |
专题 | 中国科学院南京地质古生物研究所 |
通讯作者 | Tang, Qing; Xiao, Shuhai |
作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China 2.Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA 3.Virginia Tech, Global Change Ctr, Blacksburg, VA 24061 USA 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 7.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China 8.Birbal Sahni Inst Palaeosci, Lucknow 226007, Uttar Pradesh, India 9.Nanjing Univ, Ctr Res & Educ Biol Evolut & Environm, Nanjing 210023, Peoples R China |
推荐引用方式 GB/T 7714 | Tang, Qing,Pang, Ke,Li, Guangjin,et al. The Proterozoic macrofossil Tawuia as a coenocytic eukaryote and a possible macroalga[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,576:15. |
APA | Tang, Qing.,Pang, Ke.,Li, Guangjin.,Chen, Lei.,Yuan, Xunlai.,...&Xiao, Shuhai.(2021).The Proterozoic macrofossil Tawuia as a coenocytic eukaryote and a possible macroalga.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,576,15. |
MLA | Tang, Qing,et al."The Proterozoic macrofossil Tawuia as a coenocytic eukaryote and a possible macroalga".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 576(2021):15. |
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