简介:Onthebasisofexistingconodontdata,theauthorshavestudiedtheLatePermian-EarlyTriassicconodontsofdifferentformsandbiofaciesindetail.Fiveconodontbiofaciesarerecognized,fromshallowtodeepwaters1.Hindeodusconodontbiofacies,2.Pachycladina-Parachirognathusconodontbiofacies,3.Gondolella-Hindeodusconodontbiofacies,4.Gondolella-Neospathodusconodontbiofacies,and5.Xaniognathusconodontbiofacies.Consideringthetemporalandspatialchangesoftheseconodontbiofacies,3conodontbloprovinceshavebeendivided.Inlightofthebiofacieschangesofeachbioprovince,theauthorsalsodiscuss,inthispaper,theregularityoftransgression-regressioncyclesofeasternTethysandtheirpossiblerelationtothemassbioticalternation.