noun
common species
Used in biology and ecology to refer to a species that is widespread or frequently encountered, as opposed to rare or endemic species.
この地域ではスズメが普通種だ。
In this area, the tree sparrow is a common species.
noun which may take the genitive case particle 'no'
Used as a no-adjective to describe a species that is found worldwide or across many regions; a technical term in ecology.
その植物は普通種の分布を示す。
That plant shows a cosmopolitan distribution.