“…1998, 2004; Tanaka et al . 2002, 2013; Irizuki, 2003; Tanaka, 2003; Tanaka, Tsukawaki & Ooji, 2004; Tanaka & Nomura, 2009; Matsuura, Irizuki & Hayashi, 2013; Tanaka, Nomura & Hasegawa, 2012). However, only seven studies have reported a Palaeogene ostracod assemblage in Japan (Yamaguchi, 2004, 2006; Yamaguchi, Matsubara & Kamiya, 2005; Yamaguchi, Nagao & Kamiya, 2006; Yamaguchi & Kamiya, 2007, 2009; Yamaguchi & Kurita, 2008).…”