For each species group, branch lengths were averaged to produce the trees shown (Figure 2).

Publications are typically produced by a contractor knowledgeable about the species groups.

Rats from this species group have been used as laboratory animals.

In regards to whether or not members of a species group share a range, sources differ.

The examples given below may support both uses of the term "species group."

A number of these genes have been found in the melanogaster species group.

"On the definition of ecological species groups in tropical rain forests".

It is the type of its species group.

Based on morphology, Oreoglanis has been divided into two species groups.

This method also allows the species group of Blastocystis to be identified.