There are few survivors of the animals that lived in the Paleozoic period. 古生代的動物現今已鮮有孑遺。
The Galeaspid is one major group of Agnatha in the Middle Paleozoic, and is mainly distributed in China and North Vietnam. 摘要盔甲魚類是古生代中期化石無頜類的主要類群，其分布主要限于我國境內以及越南北部。
用作名詞(n.)
On this basis the paleogeographical changing process during the Paleozoic in the eastern Qinling is discussed. 在此基礎上探討了東秦嶺古生代古地理變遷過程。
Ancient plant in the early Paleozoic marine mainly to the late Silurian Period, the original plants begin boarding land. 古植物在古生代早期以海生藻類為主，至志留紀末期，原始植物開始登上陸地。