con-specific

Updated: July 15, 2026

So naturalists had a distinct idea of what they meant by the term species, and a practical rule, which was hardly the less useful because difficult to apply in many cases, and because its application was indirect: that is, the community of origin had to be inferred from the likeness; such degree of similarity, and such only, being held to be con-specific as could be shown or reasonably inferred to be compatible with a common origin.

Asa Gray - Darwiniana; Essays and Reviews Pertaining to Darwinism