> the recent discovery of a female Denisovan finger bone and various teeth shows that they had no morphological similarities to either Neanderthals or modern humans.

Does "morphological similarities" have a particular definition in palaeoanthropology beyond the apparently plain meaning of the words? Even if "they" refers to the finger bone and teeth rather than the Denisovans as a whole, I would have thought they would have had some morphological similarities to modern humans, otherwise they wouldn't be recognisable as a finger bone and teeth.