EDIT

The external service for GBIF works but only for species rank.

Please add service also für infraspecific taxa (same semantic).

Example Genus: 'http://data.gbif.org/species/Perisoreus%20'

space at the end not required

Example Species: 'http://data.gbif.org/species/Perisoreus%20canadensis'

OK

Example Subspecies: 'http://data.gbif.org/species/Perisoreus%20canadensis'

Not ok. Change to 'http://data.gbif.org/species/Perisoreus%20canadensis%20bicolor'