These species were distinguished from one another primarily by differences in the shape of the teeth, the most common material found.

The subspecies are distinguished primarily by differences in body size.

Different genera and species are distinguished primarily by the form of the test.

The pilots primarily distinguish themselves as either "purple" or "silver."

Two years ago most of the clerks were law students, distinguished from their anxious peers primarily by higher grades.

The court indicated that they can be distinguished primarily on the basis of the method of operation.

Those named in the 19th century were distinguished primarily by the shape of their teeth, and have since been combined with T. antiqua.

The tree is distinguished primarily by its pale-green and cream-flecked leaves.

Absolute and conjunct forms are distinguished primarily by the endings.

Today's safety relays are distinguished primarily by their technological design: