Author Affiliations +
Gengo Tanaka,1 Nguyen Duc Phong,2 TOSHIFUMI KOMATSU3
1Gunma Museum of Natural History, 1674-1 Kamikuroiwa, Tomioka, Gunma 370-2345, Japan (e-mail: ) tanaka@gmnh.pref.gunma.jp
2Department of Palaeontology & Stratigraphy, Vietnam Institute of Geosciences and Mineral Resources (VIGMR), Hanoi, Vietnam (e-mail: ) phongcs@yahoo.com
3Faculty of Science, Kumamoto University, Kumamoto 860-8555, Japan (e-mail: ) komatsu@sci.kumamoto-u.ac.jp (Japan)