Assertion: river dolphin's population | /r/HasProperty | recognized as subspecie
Facets:
Source sentences:
text: Three geographic populations have been recognized as subspecies: I. g. geoffrensis in the Amazon basin, except for the Madeira drainage in Bolivia above the Teotonio rapids, I. g. boliviensis in the upper Madeira drainage, and I. g. humboldltiana in the Orinoco basin.
text: A series of rapids and waterfalls in the Madeira River have isolated one population, recognized as the subspecies I. g. boliviensis, in the southern part of the Amazon basin in Bolivia.