Cyrtoconic nautiloid cephalopods from the British Silurian
  • 【摘要】

    Three British Silurian species of the cephalopod order Orthocerida are described, two of Cyrtocycloceras and one of Gaspocyrtoceras. Five species described from the order Oncocerida include two of Amp... 展开>>Three British Silurian species of the cephalopod order Orthocerida are described, two of Cyrtocycloceras and one of Gaspocyrtoceras. Five species described from the order Oncocerida include two of Amphicyrtoceras and one each of Cyrtorizoceras, Oonoceras and Bassettoceras, the last genus being new, as are the species Cyrtorizoceras yochelsoni and Amphicyrtoceras rickardsi. Their distributions are indicated. 收起<<

  • 【作者】

    Holland CH 

  • 【刊期】

    Proceedings of the Geologists' Association SCI 2007年4期

  • 【语种】

    eng