Comparison of localities, formations and ages of sirenian fossils in the Honshu area

Occurrences of sirenian fossils are reported by 1) Matsuura (1996),  2) Kitamura (1997), 3) Takayama et al.(1988), 4) Omura et al.(1989), 5) Nagasawa et al.(2008), 6) Sato and Kameo (1996), 7) Sato (2007), 8) Amano et al.(2012), 9) Shikama and Domning (1970), 10) Nagamori (1998), 11) Yonaga et al.(2018), 12) Research Group for Fossil Sirenia from Myoken (2008), 13）Yanagisawa et al.(1986), 14) Nagasawa et al.(2003), 15) Applied Geological Society of Yamagata (2016), 16) Osawa et al.(1986), 17) Tsuchiya (1989), 18) Moriya et al.(2008), 19) Nagasawa and Kobayashi (1998), 20) Nagasawa et al.(1998), 21) Moriya et al.(2008), 22) Nagasawa (2023), 23) Shinmura et al.(2001), 24) Shiba et al.(2007), 25) Taru and Matsushima (1999), 26) Masuda and Miyasaka (1996), 27) Jinbo et al.(2017), 28) Kohno et al.(2007), 29) Okada (1987), 30) Saito (1988), 31) Koizumi (1990), 32) Furusawa and Kohno (1994), 33)Watanabe and Danhara (1996), 34) Nikaido and Kikuchi (1993), 35) Akiba (1988). See references in the article, Nagasawa et al. (2024) A sirenian fossil of Hydrodamalis from the Zukawa Formation, Takaoka City, Toyama Prefecture, central Japan: cold-adapted sirenians migrated southward in the Sea of Japan, Kaseki, 116, 19-34. doi: 10.14825/kaseki.116.0_19