The main island of Sri Lanka is home to 16 endemic mammals. Number of terrestrial mammals that have been recorded from the country is 91. Additionally there are 28 marine mammals in the oceans surrounding the island. Being an island Sri Lanka lacks land area to supports large animals. However fossil evidence of large archaic species of rhinoceroses, hippopotamuses, and lions have been discovered. The flora and fauna of Sri Lanka is mostly understudied. Therefore, the number of endemics could be underestimated. All three endemic genera Solisorex, Feroculus and Srilankamys, of Sri Lanka are monotypic.