| theropithecus gelada distribution and variations related to taxonomy: history, challenges and implications for conservation. | despite the uniqueness and importance of theropithecus in palaeontological studies, little is known about the geographical and taxonomic differentiation in this genus, now restricted to the ethiopian highlands. traditionally, the single living species theropithecus gelada (rüppell 1835) has been considered to comprise two subspecies: the nominate t. g. gelada in the northern highlands, and t. g. obscurus heuglin 1863, from latitude 12 degrees to 9 degrees n in the south. both the distributions a ... | 2010 | 20509040 |