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2 0 0 0 OA Kasimovian (Late Pennsylvanian) conodont fauna from a limestone block in the Ōtani Formation, Kuzuryu area of the Hida Gaien belt, Fukui Prefecture, central Japan

著者
Yui Takahashi Yuichi Fukushima Gengo Tanaka Yukio Miyake
出版者
The Geological Society of Japan
雑誌
地質学雑誌 (ISSN:00167630)
巻号頁・発行日
vol.128, no.1, pp.65-73, 2022-01-15 (Released:2022-05-21)
参考文献数
48
A conodont fauna characterized by Streptognathodus species was recovered from a limestone block (previously called Ōboradani Formation) of the Ōtani (=Ohtani or Otani) Formation belonging to the Hida Gaien belt distributed in the Kuzuryu area, Fukui Prefecture, central Japan. The fauna consists of Streptognathodus corrugatus, S. elegantulus, S. excelsus, S. gracilis, Idiognathodus sp., Gondolella bella, G. cf. elegantula and G. cf. pohli. These streptognathodids have a wide geographic distribution and indicate a middle-late Kasimovian (Late Pennsylvanian) age, which is slightly older than the Gzhelian (latest Pennsylvanian) age infferred from fusulinid fossils in previous studies. Thus, the limestone block of the Ōtani Formation probably contains the Upper Pennsylvanian carbonate succession.

1 0 0 0 OA Winged formicine ant fossils (Hymenoptera, Formicidae) from the Chibanian (Middle Pleistocene) Shiobara Group, Tochigi Prefecture, Japan

著者
Yui Takahashi Hiroaki Aiba
出版者
The Geological Society of Japan
雑誌
地質学雑誌 (ISSN:00167630)
巻号頁・発行日
vol.129, no.1, pp.573-578, 2023-11-02 (Released:2023-11-02)
参考文献数
28
被引用文献数
1
Fossil winged ants (family Formicidae) are sometimes found in lacustrine deposits. In the Shiobara Group, however, only a fossil of a large wingless queen ant has been described. Two types of fossil winged ants belonging to the subfamily Formicinae are newly described here and identified as Lasius sp. and Camponotus sp.