caa a22 4500 44530006X CHVBK 20180317142554.0 cr unu---uuuuu 170323e20101201xx s 000 0 eng 10.1007/s11430-010-4083-z doi (NATIONALLICENCE)springer-10.1007/s11430-010-4083-z Cell wall ultrastructures of the Proterozoic acritarch Leiosphaeridia asperata and their implications for biological affinity [Elektronische Daten] [Miao Gong, ChuanMing Zhou, LeiMing Yin, XunLai Yuan, ChunZhao Wang] Abundant sphaeroidal acritarch Leiosphaeridia asperata, with vesicle size ranging from 13 to 360 μm, occurred in the Proterozoic Liulaobei Formation shales in Huainan, Anhui Province. TEM/SEM studies of these sphaeroidal acritarchs have revealed complex ultrastructures, including ridges, bands, and possible trilaminar structures (TLS). Ridges, spaced ∼1 μm apart, are distributed regularly on the vesicle internal surface of one specimen. Some specimens have alternating electron-dense and electron-tenuous bands that are perpendicular to vesicle walls. Some specimens have trilaminar structures (TLS), while a few others have both bands and TLS. These wall ultrastructures provide evidence that the Liulaobei leiosphaerids are of green microalgae. The variation in wall ultrastructures may represent various stages in a life cycle or developmental phases in the cyst formation analogous to some modern chlorophyceaen microalgae. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 ultrastructure nationallicence affinity nationallicence Leiosphaeridia asperata nationallicence Proterozoic nationallicence Liulaobei Formation nationallicence Gong Miao State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Zhou ChuanMing State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Yin LeiMing State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Yuan XunLai State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Wang ChunZhao State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut Science China Earth Sciences SP Science China Press 53/12(2010-12-01), 1750-1755 1674-7313 53:12<1750 2010 53 11430 https://doi.org/10.1007/s11430-010-4083-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-4083-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gong Miao State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Zhou ChuanMing State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Yin LeiMing State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Yuan XunLai State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Wang ChunZhao State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/12(2010-12-01), 1750-1755 1674-7313 53:12<1750 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer