Asano, K. (1944). Hanzawaia, a New Genus of Foraminifera, from the Pliocene of Japan (Resume). The Journal of the Geological Society of Japan. 51(606): 97-99., available online at (https://www.jstage.jst.go.jp/article/geosoc1893/51/606/51_606_97/_pdf/-char/ja) page(s): p. 99, pl. 4, figs. 1, 2