Taxonomist directories by country

CONABIO (Mexico)
Deutschsprachige Systematiker (German-speaking)
Italian Zoology Taxonomists
Latvian Taxonomists
Taxonomic Resources and Expertise Directory (TRED)
UK Systematics Forum Database (UKSF).

Taxonomist directories by speciality

Drosophilid Workers
European Dipterists
Entomologists with Pacific Interests
Index Herbariorum
Paleontologists of the World
South American Dipterists
Unionid Researchers
World Diptera Systematists