Syntomodrillia portoricana is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.Bouchet, P. (2016). Syntomodrillia portoricana Fallon, 2016. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=872249 on 2016-11-20
Distribution Fossils of this species have found in the United States state of Mississippi.
References
Further reading Conrad, Timothy Abbot. Observations on the Eocene Formation, and Descriptions of One Hundred and Five New Fossils of that Period, from the Vicinity of Vicksburg, Mississippi: With an Appendix. 1848.
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