taxize: Taxonomic search and phylogeny retrieval by Scott Chamberlain, Eduard Szoecs and Carl Boettiger.
From the documentation:
We are developing taxize as a package to allow users to search over many websites for species names (scientiﬁc and common) and download up- and downstream taxonomic hierarchical information – and many other things. The functions in the package that hit a speciﬁc API have a preﬁx and sufﬁx separated by an underscore. They follow the format of service_whatitdoes. For example, gnr_resolve uses the Global Names Resolver API to resolve species names. General functions in the package that don’t hit a speciﬁc API don’t have two words separated by an underscore, e.g., classiﬁcation. You need API keys for Encyclopedia of Life (EOL), the Universal Biological Indexer and Organizer (uBio), Tropicos, and Plantminer.
Just in case you need species names and/or taxonomic hierarchy information for your topic map.