| link
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From
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To
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Geolocation
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Author - title
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Year
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| details | Eocene | Oligocene | India(Tripura) | Banerjee,D. et al. Hystrichosphaerids in the Tertiary Formations of Assam and Tripura. | 1972 |
| details | Nd | Nd | Lentin,J.K. et al. Fossil dinoflagellates: index to genera and species. | 1973 | |
| details | Nd | Nd | Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. | 1998 |