Ammonoid Palaeobiogeography of the South Kitakami Palaeoland and Palaeogeography of Eastern Asia during Permian to Triassic Time

Biogeographic analysis of Permian-Triassic ammonoids in eastern Asia suggests that the South Kitakami Paleoland, which remains as the South Kitakami Belt and Hayachine Tectonic Belt of Northeast Japan, was located in equatorial Tethys, with the South China continent and Khanka microcontinent closely situated, during the Middle to Late Penman. This proximity, especially between the South Kitakami and Khanka, persisted at least until Middle Triassic time.