caa a22 4500 445318570 CHVBK 20180317142656.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10126-010-9342-7 doi (NATIONALLICENCE)springer-10.1007/s10126-010-9342-7 Morphological and Crystallographic Transformation from Immature to Mature Coccoliths, Pleurochrysis carterae [Elektronische Daten] [Kazuko Saruwatari, Seiji Nagasaka, Noriaki Ozaki, Hiromichi Nagasawa] Morphology and crystallographic orientations of coccoliths, Pleurochrysis carterae, at the various growth stages were investigated using electron back-scattered diffraction analyses and scanning electron microscope (SEM) stereo-photogrammetry to understand the developments of two different coccolith units, namely V and R units. SEM observation indicates that the immature coccolith units at the earliest stage were not perfectly fixed on the organic base plates and several units were often lacked. The all units showed platy morphology and often lay parallel to the organic base plate. Their crystal orientations were close to that of the mature R units. With further growth, the platy morphology changes to a trapezoid to anvil-shape for both units, resulting in the interlocking structure of VR units. Morphological analyses present that the edges of the platy crystals parallel to the organic base plate were estimated as $$<48\;\overline 1>$$ , and their inner/upper surfaces were estimated as $$ \{ 10\;\overline 1 \,4\} $$ . As they interlocked further, R units inclined more outward to develop the inner tube elements with $$ \{ 10\;\overline 1 \,4\} $$ and then each unit develops differently distal and proximal shield elements, which are respectively estimated as $$ \{ 10\;\overline 1 \,4\} $$ in the distal view and $$ \{ 2\,\overline 1 \;\overline 1 \,0\} $$ planes in the proximal view. Based on the above results, the formation of different coccolith units and their growth were discussed. Springer Science+Business Media, LLC, 2011 Biomineralization nationallicence Coccolith nationallicence SEM-EBSD nationallicence Calcite nationallicence Saruwatari Kazuko Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, 113-0033, Bunkyo-ku, Tokyo, Japan aut Nagasaka Seiji Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, 113-8657, Bunkyo-ku, Tokyo, Japan aut Ozaki Noriaki Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, 241-7 Kaidobata-Nishi Nakano Shimoshinjo, 010-0195, Akita City, Akita, Japan aut Nagasawa Hiromichi Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, 113-8657, Bunkyo-ku, Tokyo, Japan aut Marine Biotechnology Springer-Verlag 13/4(2011-08-01), 801-809 1436-2228 13:4<801 2011 13 10126 https://doi.org/10.1007/s10126-010-9342-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10126-010-9342-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Saruwatari Kazuko Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, 113-0033, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Nagasaka Seiji Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, 113-8657, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 700 1- Ozaki Noriaki Department of Biotechnology, Faculty of Bioresource Sciences, Akita Prefectural University, 241-7 Kaidobata-Nishi Nakano Shimoshinjo, 010-0195, Akita City, Akita, Japan aut NATIONALLICENCE 700 1- Nagasawa Hiromichi Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, 113-8657, Bunkyo-ku, Tokyo, Japan aut NATIONALLICENCE 773 0- Marine Biotechnology Springer-Verlag 13/4(2011-08-01), 801-809 1436-2228 13:4<801 2011 13 10126 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer