Wiktionary
speciose
a. (context biology English) Rich in species, such as when a many species are members of a single genus.
Usage examples of "speciose".
By far the most speciose group of largely aquatic reptiles of the latest Cretaceous of northeastern Montana is the turtles.
The most speciose group, however, is the baenids, an extinct family of aquatic turtles.