Entelognathus
Entelognathus primordialis ( “primordial complete jaw” ) is a placoderm from the late Silurian ( Ludlow epoch ) of Qujing , Yunnan , 419 million years ago . 
<triplet> Silurian <subj> Ludlow epoch <obj> has part <triplet> Ludlow epoch <subj> Silurian <obj> part of <triplet> Qujing <subj> Yunnan <obj> located in the administrative territorial entity <triplet> Yunnan <subj> Qujing <obj> contains administrative territorial entity