n.[古生物]菊石（已灭绝的头足动物）
The Cenozoic faunas often superficially resembled those of the Mesozoic. However, there were no ammonoid cepbalopods in this most recent era. 新生代的动物群表面上类似于中生代的动物群，但新生代没有菊石头足纲动物
EARLY TRIASSIC AMMONOID SUCCESSION IN CHAOHU, ANHUI PROVINCE 安徽巢湖地区早三叠世菊石序列
CARBONIFEROUS AMMONOID ZONES FROM ZHONGNING AND ZHONGWEI, NINGXIA REGION, CHINA 宁夏卫宁地区石炭纪菊石带
NEW PROGRESS IN THE STUDY ON PERMIAN AMMONOID BIOSTRATIGRAPHY IN GUANGXI 广西二叠纪菊石生物地层学研究新进展
ammonoid fossil 菊石化石
