cies level Cocks and Fortey (1997) showed that some of the brachiopods (e.g., Aegiromena pla- nissima) were identical (a) with those from the Panghsa-pyé Beds of the Northern Shan States (Reed, 1915) and (b) with those from the Hirn- antian of the South China platform. Hence, the closest faunal comparison for Sibumasu in the latest Ordovician is once again with South Chi- na. The similarity continues between the two areas into the early Silurian, with the two se- quences becoming different only in late Llando- very times.