Complex sentence: It was originally considered to be a subspecies of the eastern lesser bamboo lemur ("Hapalemur griseus"), and is of similar size, but is darker and redder than the eastern lesser bamboo lemur, with a shorter tail and different vocalizations.
Split into simpler sentences: It was originally proposed as a subspecies of the eastern lesser bamboo lemur and is of similar size. However, it is darker and redder than the eastern lesser bamboo lemur, with a shorter tail and different vocalizations.