 Ceratopsia appears to have originated in Asia , as all of the earliest members are found there . Fragmentary remains , including teeth , which appear to be neoceratopsian , are found in North America from the Albian stage ( 112 to 100 million years ago ) , indicating that the group had dispersed across what is now the Bering Strait by the middle of the Cretaceous Period . Almost all leptoceratopsids are North American , aside from Udanoceratops , which may represent a separate dispersal event , back into Asia . Ceratopsids and their immediate ancestors , such as Zuniceratops , were unknown outside of western North America , and were presumed endemic to that continent . The traditional view that ceratopsoids originated in North America was called into question by the 2009 discovery of better specimens of the dubious Asian form Turanoceratops , which confirmed it as a ceratopsid . It is unknown whether this indicates ceratopsids actually originated in Asia , or if the Turanoceratops immigrated from North America . 
 Ceratopsia <a href='uninflect' title='1'><mark>appears</mark></a> to <a href='been_done' title='2'><mark>have</mark></a> originated in Asia , as all of the earliest members are found there . Fragmentary <a href='uninflect' title='3'><mark>remains</mark></a> , including teeth , which appear to be neoceratopsian , are found in North America from the Albian stage ( 112 to 100 million years ago ) , indicating that the group <a href='been_done' title='4'><mark>had</mark></a> dispersed across what is now the Bering Strait by the middle of the Cretaceous Period . Almost all leptoceratopsids <a href='drop_aux' title='5'><mark>are</mark></a>North American , aside from Udanoceratops , which may represent a separate dispersal event , back into Asia . Ceratopsids and their immediate ancestors , such as Zuniceratops , <a href='uninflect' title='6'><mark>were</mark></a> unknown outside of western North America , and <a href='uninflect' title='7'><mark>were</mark></a> presumed endemic to that continent . The traditional view that ceratopsoids originated in North America was called into question by the 2009 discovery of better specimens of the dubious Asian form Turanoceratops , which confirmed it as a ceratopsid . It is unknown whether this <a href='uninflect' title='8'><mark>indicates</mark></a> ceratopsids actually originated in Asia , or if the Turanoceratops immigrated from North America . 
Ceratopsia appear to done originated in Asia , as alll of the earliest members r found there . Fragmentary remain , including teeth , which appear to b neoceratopsian , arround in North America from da Albian stage ( 112 to 100 million yrs ago ) , indicating that the group done dispersed across what is now tdaBering Strait by the middle of the Cretaceous Period . Almostallll leptoceratopsids North American , aside from Udanoceratops , which may represent a separate dispersal event , bacc into Asia . Ceratopsids and their immediate ancestors , such as Zuniceratops , was unknown outside of western North America , and was presumed endemic to that continent . Thdaraditional view that ceratopsoids originated in North America was called into question by the 2009 discovery of better specimens of the dubious Asian form Turanoceratops , which confirmed it as a ceratopsid . It is unknown whether this indicate ceratopsids actually originated in Asia , or if the Turanoceratops immigrated from North America .