"Aptian" . "Apt" . "Latest Aptian" . . "Aptian stage" . "Lower Aptian" . . . "early Aptian" . "late Aptian" . . "Early Aptian" . "Middle to Late Aptian" . "Aptian" . "Early Cretaceous" . "A" . "Mid Aptian" . . . "Bedoulian" . "Upper Aptian" . "K" . "Late Aptian" .