英和和英

出典:『Wikipedia』 (2010/09/20 08:34 UTC 版)

英語による解説

引用

Waptia fieldensis was a small, shrimp-like stem group crustacean. Many Cambrian crustaceomorphs such as Waptia lack the mouthparts to be classified as crown group crustaceans that lived during the Middle Cambrian about 510 million years ago. 454 specimens of Waptia are known from the Greater Phyllopod bed, where they comprise 0.86% of the community.