Nannoceratopsis |
Nannoceratopsis gracilis
|
Nd |
Hettangian |
Bathonian |
Nannoceratopsis |
Nannoceratopsis pellucida
|
Nd |
Hettangian |
Early Oxfordian |
Nannoceratopsis |
Nannoceratopsis spiculata
|
Nd |
Bajocian |
Bathonian |
Nelsoniella |
Nelsoniella aceras
|
Nd |
Turonian |
Maastrichtian |
Nelsoniella |
Nelsoniella semireticulata
|
Nd |
Late Turonian |
Early Santonian |
Nelsoniella |
Nelsoniella tuberculata
|
Nd |
Cenomanian |
Campanian |
Nematosphaeropsis |
Nematosphaeropsis balcombiana
|
Nd |
Middle Miocene |
|
Netrelytron |
Netrelytron stegastum
|
Nd |
Early Oxfordian |
|
Netrelytron |
Netrelytron trinetrum
|
Nd |
Middle Barremian |
|
Odontochitina |
Odontochitina athabaskensis
|
Nd |
Late Barremian |
|
Odontochitina |
Odontochitina blastema
|
England(Surrey) |
Cenomanian |
|
Odontochitina |
Odontochitina costata
|
Nd |
Late Albian |
Turonian |
Odontochitina |
Odontochitina cribropoda
|
Nd |
Turonian |
Maastrichtian |
Odontochitina |
Odontochitina operculata
|
Nd |
Coniacian |
Campanian |
Odontochitina |
Odontochitina porifera
|
Nd |
Turonian |
Maastrichtian |
Odontochitina |
Odontochitina striatoperforata
|
Nd |
Albian |
Cenomanian |
Odontochitinopsis |
Odontochitinopsis incerta
|
Nd |
Coniacian |
Maastrichtian |