Elasmobranchii fossils (shark teeth) from the Miocene Mizuami Group | Bulletin of the Mizunami Fossil Museum No. 1

Bulletin of the Mizunami Fossil Museum No. 1

Elasmobranchii fossils (shark teeth) from the Miocene Mizuami Group

Junji Itoigawa and Hiroyuki Nishimoto

BMFM01-010Itoigawa&Nishimoto（PDF 9.72MB）

Itoigawa & Nishimoto (1974) [Elasmobranchii (shark)] print-version

Published: 1974/12/25 　 Page: 243–262, pls. 79–85

Six thousands specimens of Elasmobranchii fossils were obtained from the Miocene Mizunami group and twenty-six species were recognized in them as shown in Table XII-3.

Elasmobranchii assemblages in the group summarized as follows;

1. Carcharhinus Assemblage: Tukiyoshi member, Togari member, Shukubora facies (northern part).

2. Carcharhinus - Myliobatis - ("Squalus" - Squatina) Assemblage: Yamanouchi member, Kujiri member.

3. Carcharhinus - Odontaspis Assemblage: Shukubora facies (northeastern part).

4. Carcharhinus - Odontaspis - (Isurus - Negaprion) Assemblage: Nataki member.

5. Carcharhinus - Dasyatis - Negaprion - (Odontaspis) Assemblage: Nataki member (Okuna).

6. Carcharhinus - Dalatias - Odontaspis - Negaprion Assemblage: Nataki member (Togari St. 288).