Two　new　eurypterids,　a　pterygotid　Pterygotus　wanggaii　n.　sp.　and　an　adelophthalmoid　Parahughmilleria　fuea　n.　sp.,　are　described　from　the　Early　Devonian　(Lochkovian)　Xiaxishancun　Formation　of　Yunnan　province,　southwest　China.　This　discovery　represents　the　first　record　of　Parahughmilleria　from　Gondwana　and　the　first　Pterygotus　from　China.　Pterygotus　wanggaii　n.　sp.　is　characterized　by　the　first　primary　denticles　(d1,d1　＇)　being　located　on　the　middle　part　of　the　cheliceral　ramus　and　third　primary　denticles　(d3,d3　＇)　elongate,　even　longer　than　the　first　primary　denticles.　Parahughmilleria　fuea　n.　sp.　is　differentiated　by　being　a　large　Parahughmilleria　with　strongly　developed　lateral　epimera　from　tergites　T4　to　T12.　These　discoveries　not　only　extend　the　geographical　extent　of　the　genera　Pterygotus　and　Parahughmilleria　from　Euramerica　to　SW　China,　but　also　give　insight　into　the　similarity　of　ecosystem　structures　across　the　Early　Devonian　world.　In　addition,　based　on　previous　studies,　the　new　discoveries　further　support　the　hypothesis　that　eurypterids　underwent　a　crisis　during　the　Silurian-Devonian　boundary　interval.