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Asset Overview
標本 Specimen: OMNH MI-2177-1
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 シグモイダーレの気室部です。一見、正常巻きのアンモナイトのように見えます。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.
* Wright, C.W. et al. (1996) Treatise on Invertebrate Paleontology Part L Mollusca 4 Revised Volume 4: Cretaceous Ammonoidea, 362 p. Geological Soceity of America. (The specimen is in figure 193 on page 249)
