Museum bird collections continue to act as a resource for taxonomic studies.

Further taxonomic study is needed because P. breviceps might be composed of more than one species.

Moreover, his classification efforts have revolutionized the field of taxonomic study.

This is due in part to few anatomical or taxonomic studies of the relevant fossils.

He dedicated his time to taxonomic studies and the compilation of florae.

Taxonomic studies continue to resolve the classification and systematics of ants.

He became interested in using chromosomes for taxonomic studies, a method that Fernald did not support.

There has been no comprehensive taxonomic study to elucidate the generic limits of species in the family.

Since chitons were first described by Linnaeus (1758), extensive taxonomic studies at the species level have been made.

Taxonomic and ecological studies on the lichens of Southern Illinois.