A New Species of Nyanzachoerus (Mammalia, Artiodactyla, Suidae, Tetraconodontinae) from the Upper Miocene Nakali Formation, Kenya Tsubamoto, Takehisa and Kunimatsu, Yutaka and Sakai, Tetsuya and Saneyoshi, Mototaka and Shimizu, Daisuke and Morimoto, Naoki and Nakaya, Hideo and Handa, Naoto and Tanabe, Yoshiki and Manthi, Fredrick Kyalo and Nakatsukasa, Masato, Paleontological Research, 24, 41-63 (2020), DOI:http://dx.doi.org/10.2517/2019PR004