This paper describes a new genus, Hexiproductus, and three new species Companteris hexiensis, Kozlowskia ningxiaensis and Admoskovia yatzengi from the Gzhelian (Late Carboniferous) of the Hexi Corridor Terrane (HCT), Ningxia Province, northern China. A palaeobiogeographical analysis of all Hexiproductus species shows that this genus has its origin in the North China Block (NCB) in the Moscovian and later (during the Kasimovian - Artinskian) migrated, through the HCT, westerly to the Tarim Basin and beyond to Central Asia and Europe. Companteris and Admoskovia are both endemic to the Russian Platform and the HCT. Kozlowskia originated in Oklahoma, USA in earliest Pennsylvanian and rapidly dispersed northerly to Arctic Canada of the Boreal Realm and southerly to Brazil of the Gondwanan Realm. Outside America, the genus also spread over into some marginal seas of the Palaeotethys including northern Spain, Britain, Carnic Alps, Russian Platform, Fergana Basin, Junggar Basin, Tarim Basin and the HCT in the Pennsylvanian. Permian Kozlowskia exhibits a distinct anti-tropical (bipolar) distribution, as indicated by occurrences in both the high palaeolatitudinal Boreal and Gondwanan Realms and their associated middle palaeolatitudinal transitional zones. Despite carrying an overall Cathaysian biogeographical aspect, the Late Palaeozoic biotas of the HCT were considerably different to those of the neighbouring NCB, presumably as a result of significant palaeobiogeographical barriers. Furthermore, the mixed nature of the HCT faunas may also suggest that the HCT may have been located as an isolated terrane between the NCB and Laurasian landmasses throughout most stages of the Late Palaeozoic and, as such, may have acted as a stepping stone or gateway for faunal migrations between Laurasia to the west, NCB to the east, and the Tarim Basin and Qaidam Block to the south and southwest.