 Results of molecular genetic analysis of hair samples from mainland and Sunda clouded leopards showed differences in mtDNA, nuclear DNA sequences, and microsatellite and cytogenetic variation.This indicates that they diverged between 2 and 0.9 million years ago; their last common ancestor probably crossed a now submerged land bridge to reach Borneo and Sumatra.Results of a morphometric analysis of the pelages of 57 clouded leopards sampled throughout the genus' wide geographical range indicated that the two morphological groups differ primarily in the size of their cloud markings.