Complex sentence: The species status of the Silky Sifaka, as well as other sifakas, does not have universal support: in 2007, Tattersall argued against species distinctions within "Propithecus", claiming the decisions were made prematurely.
Split into simpler sentences: The species status of the Silky Sifaka, as well as other sifakas, does not have universal support. In 2007, Tattersall argued against species distinctions within "Propithecus", claiming the decisions were made prematurely.