The Medog mole ( Alpiscaptulus medogensis) is a species of mammal in the family Talpidae. It is the monotypic taxon of the genus Alpiscaptulus. It is Endemism to Tibet, where it is only found in the vicinity of Namcha Barwa in Medog County.
Taxonomy
Alongside the
Gansu mole (
Scapanulus oweni), another mole species in a
Monotypic taxon that is also
Endemism to the mountains of
China, it is one of only two species in the subfamily
Scalopinae found outside of
North America. Phylogenetic and fossil evidence indicates that the scalopine moles evolved in
Eurasia and migrated to North America during the
Neogene; however, the Gansu and Medog moles are not relict Eurasian scalopine moles, but are descendants of North American scalopine moles that migrated back to Eurasia; the hairy-tailed mole (
Parascalops breweri) of North America is more closely related to them than it is to the other two North American scalopine genera.
Phylogenetic evidence supports the Gansu and Medog moles being the closest living relatives of one another and diverging the mid-late Miocene, about 11.59 million years ago. It is thought that the rapid uplift of the Tibetan Plateau and the subsequent climate change led to the divergence of the two genera. Their habitats may have served as refugia during periods of Glacial period, allowing them to persist while most other Eurasian scalopines went extinct.
Habitat
This species is known only from the slopes of
Namcha Barwa, the highest peak of the eastern
Himalayas and 27th tallest mountain on Earth, where two specimens have been collected from burrows at and asl. The individual at 2,400 m was found in a brushy habitat dominated by
oak (
Quercus) species with abundant grass cover. The individual at 3,700 m was found in a
heath forest with mixed
bamboo forests. Both these habitats belong to the Eastern Himalayan broadleaf forests
ecoregion.
