Abstract

• Five species of Middle Devonian (Givetian) rugose corals are firstly described from the Pwepon Limestone of the Maymyo Formation at Pwepon (Pyinoolwin Township) and Kongtha (Hsipaw Township) areas. The Pwepon Limestone consists of grey to dark grey, well-bedded, hard micritic limestone intercalated with argillaceous limestone, siltstone and shale. This limestone in Pwepon and Kongtha areas is considered as the sandwiched unit of the Maymyo Formation. The Pwepon Limestone is richly fossiliferous including Eifelian and Givetian rugose coral faunas. The later, never reported before, include two new species: Argutastrea pweponsensis sp. nov., Hexagonaria carinata sp. nov. and three previously described species Grypophyllum postprimum postprimum from Late Givetian of Schweln-Kalk, NW Sauerland, Germay, Disphyllum dispar from Givetian, Dosey Limestone, Broken River Province, North Queensland, Australia and Disphyllum caespitosum from Givetian, Cürten Formation, Eifel Hill, Germany. The Myanmar Givetian species are compared with those from Europe and Australia.