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    Pentagonium obidum nov. gen. et nov. sp. (incertae sedis) from the Upper Eocene of the West Carpathians (the Podunajska Nizina lowland).
                    | Snopkova, P. and Samuel, O. | |
| 1982 | |
| Zapadne Karpaty, ser paleontologia, Geologicky Ustav Dionyza Stura, Bratislava, v.8, p.131-134, pl | |
| Pentagonium obidum nov. gen. et nov. sp. (incertae sedis) from the Upper Eocene of the West Carpathians (the Podunajska Nizina lowland). | 
Snopkova, P. and Samuel, O., 1982: Pentagonium obidum nov. gen. et nov. sp. (incertae sedis) from the Upper Eocene of the West Carpathians (the Podunajska Nizina lowland); Zapadne Karpaty, ser paleontologia, Geologicky Ustav Dionyza Stura, Bratislava, v.8, p.131-134, pl.48-50.