Data on First Record of Brown Morph Banded Langur (), Leucistic Dusky Leaf Monkey () in Malaysia and Review of Morph Diversity in Langur (Colobinae).

Morphism refer to polymorphic species, in which multiple colour variants coexist within a population. Morphism in primates is common and langurs also exhibit certain characteristics of morphism, such as conspicuous natal coats. Banded langurs () and dusky leaf monkey () exhibits the same characteristics of conspicuous natal coats, but these coats are only limited to infants and changed when they reached adulthood.