On Two New Fossil Cephalopoda from the Tertiary of Izumo.,

MioceneNautilus(Mollusca, Cephalopoda) from Taiwan, and a review of the Indo‐Pacific fossil record ofNautilus

“…Eutrephoceras (Kobayashi, 1960;Yokoyama, 1913) are now known to be argonautids (e.g., Noda et al, 1986). Three Eutrephoceras species have been named from Miocene rocks in southern Australia, listed by Kummel (1956) and reassessed by McGowran (1959): E. altifrons Chapman, 1915, andE.…”

“…The shell of N. javanus would have been more inflated in apertural view than is apparent (Figure 3h,i) because approximately half of the width (the left side of the shell in life) is eroded away. Miocene fossils from Japan that were previously identified as Nautilus or Eutrephoceras (Kobayashi, 1960; Yokoyama, 1913) are now known to be argonautids (e.g., Noda et al, 1986). Three Eutrephoceras species have been named from Miocene rocks in southern Australia, listed by Kummel (1956) and reassessed by McGowran (1959): E. altifrons Chapman, 1915, and E. geelongensis Foord, 1891, are found in the same formations and intergrade with each other according to McGowran (1959), and E. balcombensis Chapman, 1915.…”

Izumonauta(Argonautidae, Cephalopoda Coleoidea) from the Kapitean Stage (uppermost Miocene) of New Zealand

“…The latter statement refers to the adult sculpture, since the radial ribs appear to be considerably stronger in the juvenile stage of A. kasataniensis. Argonauta tokunagai Yokoyama, 1913, also compared with I. lata, has stronger, more prominent radial ribs in the juvenile stage and the peripheral keels are weakly tuberculate.…”

島根県中部中新統布志名層下部から産出したタコブネ類化石と共産する微化石群集

“…Yo- Yokoyama, 1913;Tomita and Sakai, 1937;Nomura andHatai, 1939 , 1995 Mizuhobaris izumoensis Yokoyama Modiolus modiolus difficilis Kuroda and Habe = Modiolus kurilensis Bernard , 1996Blow 1969N. 10 N. 11 , 1984 13.9 0.7 Ma 14.6 0.5 Ma , 1984;, 1994 14 13 Ma Table 1 Tanaka et al, 2002et al, Tanaka, 2003 Kotoracythere tsukagoshii Tanaka Kennett et al, 1985G.…”