orthoceras的翻译,读音
释义:
直角石属
n. An extinct genus of Paleozoic Cephalopoda, having a
long, straight, conical shell. The interior is divided into numerous
chambers by transverse septa.
n. An extinct genus of Paleozoic Cephalopoda, having a
long, straight, conical shell. The interior is divided into numerous
chambers by transverse septa.
