Indian muntjac species to actually have antlers. Ancestor to muntjacs is the "Dicrocerus elegans" which is the oldest known deer to shed antlers. Other fossils found that deer species experienced a split of the Cervinae from the Muntiacinae, the latter of which remained of similar morphology. Muntjacs of this time during the Miocene were smaller than their modern counterparts. Molecular data has suggested that Indian and Fea’s muntjac share a common ancestor while giant muntjac are more closely related to Reeve’s muntjac. Although the muntjac deer has a long lineage, little has been studied in terms of their fossil record. The female
Reeves's muntjac species except where already established. Colonies exist throughout England south of Derbyshire, and the population continues to grow. In Ireland, sightings in 2008 caused the government, concerned at the risk of the species becoming established, to quickly introduce a year-round hunting season. In the 1960s, several specimens escaped from an exhibition zoo in the Bōsō Peninsula in eastern Japan. By 2017, their numbers had reached at least 60,000. It is considered a harmful invasive species and has inflicted severe damage to ashitaba plantations. Also, Reeves's muntjac escaped a zoo on Izu Ōshima in 1970 when a fence fell due to