[FAD=first appearance datum; LAD=last appearance datum]
*Zonal marker for NP zones of Martini (1971)
#Zonal marker for CP Zones of Okada and Bukry (1980)
LAD Zygrahablithus bijugatus - near top of Zone NP 25, late Oligocene or early Miocene
LAD Dictyococcites bisectus - near top of Zone NP 25, late Oligocene or early Miocene
LAD *Helicosphaera recta - top Zone NP 25, late Oligocene
LAD *#Sphenolithus distentus - top Zone NP 24, top Zone CP 19a, late Oigocene
FAD Helicosphaera pseudolockeri - within Zone NP 24, early Oligocene
FAD Helicosphaera recta - lower Zone NP 24, early Oligocene
FAD *#Sphenolithus ciperoensis - base of Zone NP 24, base Zone CP 19a, early Oligocene
FAD Sphenolithus distentus - within Zone NP 23, base Zone CP 18, early Oligocene
LAD *#Reticulofenestra umbilicus - top of Zone NP 22, top Zone CP 16c, early Oligocene
LAD *Cyclococcolithus formosus - top Zone NP 21, early Oligocene
LAD Isthmolithus recurvus - within Zone NP 21, early Oligocene
LAD *#Discoaster saipanensis - top of Zone NP 19/20, top Zone CP 15b, late Eocene
LAD #Discoaster barbadiensis - top of Zone NP 19/20, to of Zone CP 15b, late Eocene; actually has its LAD slightly below the LAD of D. saipanensis
LAD Cribrocentum reticulatum - very near top of Zone NP 19/20, late Eocene
FAD *Isthmolithus recurvus - base of Zone NP 19/20, late Eocene
FAD *#Chiasmolithus oamaruensis - base of Zone NP 18, base Zone CP 15a, late Eocene
LAD Pseudotriquetrorhabdulus inversus - within Zone NP 17, middle Eocene
LAD Campylosphaera dela - within Zone NP 17, middle Eocene
LAD Daktylethra punctulata - within Zone NP 17, middle Eocene
LAD Chiasmolithus grandis - within Zone NP 17, middle Eocene
LAD Chiasmolithus bidens/solitus - top of Zone NP 16, middle Eocene; these two species are not differentiated in this study.
FAD Helicosphaera reticulata - upper Zone NP 16, middle Eocene
FAD Helicosphaera compacta - upper Zone NP 16, middle Eocene
FAD Pemma papillatum - within Zone NP 16, middle Eocene
FAD Cribrocentrum reticulatum - lower Zone NP 16, middle Eocene
FAD Dictyococcites bisectus - lower Zone NP 16, middle Eocene
FAD #Reticulofenestra umbilicus - large forms first appear near base of Zone NP 16, base Zone CP 14a, middle Eocene
LAD *Rhabdosphaera gladius - top of Zone NP 15, middle Eocene
FAD Pentaster lisbonensis - within Zone NP 15, middle Eocene
FAD *#Nannotetrina fulgens - base of Zone NP 15, base of Subzone CP 13a, middle Eocene - the genus Nannotetrina first appears very near the Zone NP 14/15 boundary
LAD #Rhabdosphaera inflata - top of Zone NP 14, base of Subzone CP 12b, middle Eocene
FAD #Rhabdosphaera inflata - mid Zone NP 14, of top Subzone CP 12b, middle Eocene
FAD *#Discoaster sublodoensis - base of Zone NP 14, base of Subzone CP 12a, early Eocene
FAD Reticulofenestra spp. - within Zone NP 13, early Eocene
LAD *Rhomboaster orthostylus - top of Zone NP 12, early Eocene
FAD Helicosphaera lophota - near top of Zone NP 12; has been used to approximate the Zone NP 12/NP 13 boundary, early Eocene
FAD Helicosphaera seminulum - mid Zone NP 12, early Eocene
FAD *#Discoaster lodoensis - base of Zone NP12, base Zone CP10, early Eocene
LAD Neochiastozygus concinnus - within Zone NP 11, early Eocene
LAD Zygodiscus herlyni - within Zone NP 11, early Eocene
FAD Discoaster binodosus - within Zone NP11
LAD *#Rhomboaster contortus - top of Zone NP10, top Subzone CP9a
FAD Rhomboaster orthostylus - upper Zone NP10
FAD Rhomboaster contortus - mid or upper Zone NP10, base Subzone CP9a.
FAD #Discoaster diastypus - mid or upper Zone NP10, base Subzone CP9a
LAD Placozygus sigmoides - lower Zone NP 10, early Eocene
LAD Fasciculithus spp. - lower Zone NP10
LAD Hornibrookina spp. - lower Zone NP 10, early Eocene
FAD *Rhomboaster bramlettei - base of Zone NP10, early Eocene
FAD Rhomboaster spineus - uppermost Zone NP9
LAD Fasciculithus alanii - within upper Zone NP 9, late Paleocene
FAD Transversopontis pulcher sensu ampl. - within upper Zone NP9
LAD Scapholithus apertus - upper Zone NP 9, late Paleocene
FAD Discoaster mediosus - within upper Zone NP9
FAD Toweius occultatus - within upper Zone NP9
FAD #Campylosphaera dela - within upper Zone NP9, base Subzone CP8b (includes C. eodela)
FAD Lophodolithus nascens - within upper Zone NP9
FAD Toweius callosus - within Zone NP9
FAD Discoaster lenticularis - near base of Zone NP9
FAD *#Discoaster multiradiatus - base of Zone NP9, base Subzone CP8a
FAD Neochiastozygus junctus - within Zone NP 8, late Paleocene
FAD *Heliolithus riedellii - base of Zone NP 8, late Paleocene
FAD #Discoaster mohleri - probably equivalent to base Zone NP 7, base CP 6, late Paleocene
FAD *Heliolithus kleinpellii - base Zone NP 6, late Paleocene
FAD Heliolithus cantabriae - upper Zone NP 5, late Paleocene
FAD Toweius eminens var. tovae - within Zone NP 5, late Paleocene
FAD Scapholithus apertus - within Zone NP 5, late Paleocene
FAD Chiasmolithus bidens - lower Zone NP 5, late Paleocene
FAD *#Fasciculithus tympaniformis - base of Zone NP 5, base CP 4, late Paleocene
FAD Chiasmolithus sp. aff. C. bidens (Bramlette & Sullivan) Hay & Mohler - within Zone NP 4
FAD Toweius pertusus - within Zone NP 4
FAD Ellipsolithus distichus - near base of Zone NP 4, early Paleocene
FAD Ellipsolithus bollii - near base of Zone NP 4, early Paleocene
FAD *Ellipsolithus macellus - base of Zone NP 4, early Paleocene
FAD Chiasmolithus consuetus - within Zone NP 3, early Paleocene
FAD *#Chiasmolithus danicus - base of Zone NP 3, early Paleocene
FAD *#Cruciplacolithus tenuis - base Zone NP 2, early Paleocene
FAD Cruciplacolithus asymmetricus - upper Zone NP 1, early Paleocene
FAD Cruciplacolithus intermedius - within Zone NP 1, early Paleocene
FAD Crucipalcolithus primus - within Zone NP 1, early Paleocene
FAD increased Thoracosphaera specimens - lower Zone NP 1, early Paleocene
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Last modified: 11 July 2000