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Table T5. Ages of biostratigraphically useful radiolarian datums calibrated to the Berggren et al. (1995b) geomagnetic polarity time scale.

Datum Age
(Ma)
Source
LO Stylatractus universus 0.46 Caulet, 1991
LO Pterocanium trilobum 0.83 Lazarus, 1992
LO Eucyrtidium calvertense 1.92 Lazarus, 1992
LO Triceraspyris antarctica 1.92 Lazarus, 1992
FO Lithelius nautiloides 1.93 Caulet, 1991
FO Triceraspyris antarctica 1.93 Caulet, 1991
LO Helotholus vema 2.42 Lazarus, 1992
LO Desmospyris spongiosa 2.44 Lazarus, 1992
FO Cycladophora davisiana 2.61 Lazarus, 1992
LO Prunopyle titan 3.5 Lazarus, 1992
FO Helotholus vema 4.57 Lazarus, 1992
LO Helotholus praevema 4.6-4.62 Caulet, 1991
FO Desmospyris spongiosa 4.98-5.01 Caulet, 1991
FO Prunopyle titan 5.01-5.11 Caulet, 1991
LCO Lychnocanoma grande 5.03 Lazarus, 1992
LO Amphymenium challengerae 6.1 Lazarus, 1992
FO Amphymenium challengerae 6.58 Lazarus, 1992
FO Lamprocyrtis heteroporos 6.79 Morley and Nigrini, 1995
FO Acrosphaera? labrta 7.71 Lazarus, 1992
LO Cycladophora spongothorax 9.12 Lazarus, 1992
LO Stichocorys peregrina 9.22 Lazarus, 1992
LCO Ceratocyrtis stigi 9.32 Lazarus, 1992
FCO Ceratocyrtis stigi 9.83 Lazarus, 1992
FO Acrosphaera australis 10.36 Lazarus, 1992
LO Cycladophora humerus 10.53 Lazarus, 1992
FO Eucyrtidium pseudoinflatum 10.61 Lazarus, 1992
LO Actinomma glownini 10.77 Lazarus, 1992
FO Cycladophora spongothorax 12.55 Lazarus, 1992
FO Dendrospyris megalocephalis 12.68 Lazarus, 1992
FO Actinomma glownini 13.61 Lazarus, 1992
FO Cycladophora humerus 14.18 Lazarus, 1992
FO Eucyrtidium punctatum 17.02 Lazarus, 1992
FO Cycladophora golli regipileus 19.11 Lazarus, 1992
FO Cyrtocapsella longithorx 20.72 Lazarus, 1992
FO Cyrtocapsella tetrapera 22.48 Harwood et al., 1992
LO Lithomelissa sphaerocephalis 23.353-24.730 Takemura and Ling, 1997
FO Cycladophora campanula 23.94-25.26 Caulet, 1991
FO Lipmanella hister 23.94-25.26 Caulet, 1991
LO Axoprunum irregularis 24.118-?28.745 Takemura and Ling, 1975
LO Eucyrtidium antiquum 26.77-30.05 Caulet, 1991
LO Lophocyrtis longiventer 26.77-30.05 Caulet, 1991
FO Calocyclas sp. A ?28.283-29.401 Takemura and Ling, 1997
LO Lithomelissa challengerae ?28.283-29.401 Takemura and Ling, 1997
FO Lychnocanoma conica 28.745-30.098 Takemura and Ling, 1997
LO Calocyclas cf. semipolita 30.479-?33.058 Takemura and Ling, 1997
FO Axoprunum irregularis 30.939-34.655 Takemura and Ling, 1997
FO Eucyrtidium antiquum 30.939-34.655 Takemura and Ling, 1997
LO Eucyrtidium spinosum 30.939-34.655 Takemura and Ling, 1997

Note: FO = first occurrence, LO = last occurrence, FCO = first common occurrence, LCO = last common occurrence.

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