Brachyericines (Erinaceidae, Eulipotyphla) from the early Miocene of central Nei Mongol, China

Brachyericinae is a subfamily of Erinaceidae (hedgehogs and moonrats) with a very short history and limited distribution. Fossil records of brachyericines, with rare materials, were confined to the Oligocene and early Miocene in Central Asia and to the Miocene in North America. Here, we report three forms of short-faced hedgehogs: <i>Synexallerix junggarensis</i>, Brachyericinae gen. et sp. indet. 1 and Brachyericinae gen. et sp. indet. 2 from Aoerban and Gashunyin Adege, localities of the early Miocene in Central Nei Mongol. <i>S. junggarensis</i> is the first discovery outside the Suosuoquan Formation in Xinjiang and detailed description of the new materials, including a nearly complete skull, clarifies its taxonomic position within the Brachyericinae. The new Nei Mongol material is important not only because they include a nearly complete skull of <i>S. junggarensis</i> (previously known by a rostral part of the skull) but also because of the presence of three taxa of the brachyericines from the same general area. The similarity of its morphological characteristics with the North American genera also further confirms the close affinities of brachyericines from the two continents during the early Miocene.