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Johann Anton Güldenstädt (26 April 1745 in Riga, Latvia – 23 March 1781 in St. Petersburg, Russia) was a Baltic German naturalist and explorer in Russian service. Güldenstädt lost both his parents early, and from 1763 onwards studied pharmacy, botany and natural history in Berlin. At the age of 22, he obtained his doctorate in medicine at the University of Frankfurt in 1767. In the following year, he joined the Russian Imperial Academy of Sciences' expedition sent by Catherine II of Russia to explore the Russian empire's southern frontier. Güldenstädt travelled through Ukraine and the Astrakhan region, as well as the northern Caucasus and Georgia, both of which were almost entirely beyond the borders of the Russian empire. In March 1775 he returned to St Petersburg. The results of the expe