sentences:  *estimate
  
  Following the phylogenetic species concept, recent research has suggested the northern white rhinoceros may be an altogether different species, rather than a subspecies of white rhinoceros, in which case the correct scientific name for the former is "Ceratotherium cottoni".Distinct morphological and genetic differences suggest the two proposed species have been separated for at least a million years.However, the results of the research were not universally accepted by other scientists.