At first, he assumed that they belonged to the species on the planet's surface.

How are we to decide whether populations living in different places belong to the same species?

Just that I'm ashamed to belong to the same species as the man.

This implies that all members belong to the same species and live near each other.

All of these are now considered to belong to the same species.

Opinions vary as to whether all remains belong to the same species.

It is not definitely known whether both sexes belong to the same species.

They are able to interact with any fish belonging to the same species.

Mixing them with fish belonging to the same species is also not recommended.

The trees, belonging to the species already discovered, were magnificent.