プラビトセラス シグモイダーレ　Pravitoceras sigmoidale (part 2)

Description

標本　Specimen: OMNH MI-2177-2 産地　Occurrence: 淡路島　Awaji Island, Hyogo Prefecture, Japan 地質年代　Geological age: 白亜紀後期カンパニアン期　Campanian, Late Cretaceous 備考　Note: この標本は、プラビトセラス シグモイダーレの住房部です。プラビトセラスは、日本固有の異常巻きアンモナイトです。A part of a well preserved specimen of *Pravitoceras sigmoidale* Yabe, 1902 which is one of unique heteromorph ammonoids of Japan. 関連資料　Related publications * Matsumoto, T. et al. (1981) Note on *Pravitoceras sigmoidale* (Cretaceous heteromorph ammonite). Transactions and Proceedings of the Palaeontological Society of Japan, New series 123: 168-178. * Morozumi, Y. (1985) Late Cretaceous (Campanian and Maastrichtian) ammonites from Awaji Island, Southwest Japan. Bulletin of Osaka Museum of Natural History 39: 1-58. * Misaki, A. et al. (2014) Commensal anomiid bivalves on Late Cretaceous heteromorph ammonites from south-west Japan. Palaeontology 57: 77-95.