TY - JOUR
T1 - Early Permian (Cisuralian) ostracods from Japan
T2 - Characteristic ostracod assemblage from a seamount of the Panthalassic Ocean
AU - Tanaka, Gengo
AU - Miyake, Yukio
AU - Ono, Teruo
AU - Yuan, Aihua
AU - Ichida, Masahiro
AU - Maeda, Haruyoshi
AU - Crasquin, Sylvie
N1 - Funding Information:
G.T. would like to dedicate this paper to the late emeritus professor Noriyuki Ikeya. The many helpful comments of Carys Bennett (University of Leicester, UK), Vincent Perrier (Claude Bernard University Lyon 1, France), Ewa Olempska (Polish Academy of Sciences, Poland), and Renate Matzke-Karasz (Ludwig Maximilians Universität München, Germany) are appreciated. We wish to thank Edanz Editing for correcting the English. We also express our sincere thanks to De-qiong Chen and Shang-qi Wang (Nanjing Institute of Geology and Palaeontology, Academia Sinica, China), Baochun Zhou (Shanghai Science & Technology Museum, China), Yaquiong Wang (Nanjing Institute of Geology and Palaeontology, China), Alan Lord (Senckenberg Institute, Germany) and Akira Tsukagoshi (Shizuoka University, Japan) for providing literature. Thanks are also due to the staff of the Gunma Museum of Natural History for provision of facilities. This research was partly supported by Grants-in-Aid for Science Research from the Ministry of Education and Science Government of Japan (No. 24340129 for H. M. and No. 24540501, No. 16K05592 for G. T.)
Publisher Copyright:
© 2018 Magnolia Press. All rights reserved.
PY - 2018/11/12
Y1 - 2018/11/12
N2 - Silicified ostracods were recovered from Cisuralian micritic limestones of the Ryozensan Limestone Formation from the southwestern part of Ryozensan Mountain, Taga City located in Shiga Prefecture, Central Japan. Twenty-seven species belonging to 19 genera were obtained, of which six species are new and are described here: Bairdia tagaensis Tanaka sp. nov., Bairdiacypris ikeyanoriyukii Tanaka sp. nov., Kellettina noriyukii Tanaka sp. nov., Microcheilinella shigensis Tanaka sp. nov., Oliganisus ryozensannensis Tanaka sp. nov., and Pustulobairdia ohmiensis Tanaka sp. nov. Some Palaeozoic limestone localities in Japan cap greenstones and are surrounded by younger cherts (such as Mino Terrane of this study). They represent a characteristic reef and reef-slope environment around a seamount surrounded by deep sea ocean floor. This result is concordant with the ostracod assemblage. After this report, a Panthalassan ostracod fauna could be defined for the Cisuralian.
AB - Silicified ostracods were recovered from Cisuralian micritic limestones of the Ryozensan Limestone Formation from the southwestern part of Ryozensan Mountain, Taga City located in Shiga Prefecture, Central Japan. Twenty-seven species belonging to 19 genera were obtained, of which six species are new and are described here: Bairdia tagaensis Tanaka sp. nov., Bairdiacypris ikeyanoriyukii Tanaka sp. nov., Kellettina noriyukii Tanaka sp. nov., Microcheilinella shigensis Tanaka sp. nov., Oliganisus ryozensannensis Tanaka sp. nov., and Pustulobairdia ohmiensis Tanaka sp. nov. Some Palaeozoic limestone localities in Japan cap greenstones and are surrounded by younger cherts (such as Mino Terrane of this study). They represent a characteristic reef and reef-slope environment around a seamount surrounded by deep sea ocean floor. This result is concordant with the ostracod assemblage. After this report, a Panthalassan ostracod fauna could be defined for the Cisuralian.
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U2 - 10.11646/zootaxa.4515.1.1
DO - 10.11646/zootaxa.4515.1.1
M3 - Article
C2 - 30486187
AN - SCOPUS:85056902395
SN - 1175-5326
VL - 4515
SP - 1
EP - 67
JO - Zootaxa
JF - Zootaxa
IS - 1
ER -