What is "exilisciurus"

Exilisciurus is a genus of rodent in the family Sciuridae native to Asia. The three species of Exilisciurus include:

• The least pygmy squirrel (E. exilis) also known as the plain pygmy squirrel is olive-brown and endemic to forests in Borneo and Banggi Island. It is among the smallest squirrels in the world. Data regarding its population is deficient.
• The Philippine pygmy squirrel (E. concinnus) is endemic to the Philippines and listed as " Least Concern" on the IUCN Red List.
• The tufted pygmy squirrel (E. whiteheadi) is endemic to highland forest in Borneo. The common name of this tiny squirrel refers to its distinctive ear-tufts. Its diet consists mainly of the lichens and mosses which cover the trees it inhabits. It is listed as "Least Concern" by the IUCN.