Configuration of radula sac of nine species of Nipponacmea A N. gloriosa, RM32355, Ibusuki, Kagoshima (41) B N. fuscoviridis, RM32354, Akune, Kagoshima (39) C N. boninensis, RM31817, Chichijima Is., Ogasawara (43) D N. schrenckii, RM31906, Kazamaura, Aomori (6) E N. concinna, RM32353, Nagatamachi, Nagasaki (35) F N. radula, RM32363, Akune, Kagoshima (37) G N. nigrans, RM32362, Kushimoto, Wakayama (20) H N. habei, RM32356, Tateyama, Chiba (13) I N. teramachii, RM31928, Suo-Oshima, Yamaguchi (30). Scale bars: 5 mm.

 
 
  Part of: Teruya S, Setiamarga DHE, Nakano T, Sasaki T (2022) Molecular phylogeny of Nipponacmea (Patellogastropoda, Lottiidae) from Japan: a re-evaluation of species taxonomy and morphological diagnosis. ZooKeys 1087: 163-198. https://doi.org/10.3897/zookeys.1087.78193