Species
Eoplacognathus pseudoplanus (Viira, 1972)
Type specimen data
Synonymy list
1972     Ambalodus pseudoplanus Viira — Viira , pp. 56, fig. text fig. 46
1974     Ambalodus pseudoplanus sp. n. — Viira , pp. 54, fig. VI 25,29, 31; text fig. 43-46
1990     Eoplacognathus pseudoplanus (Viira, 1972) — Männik & Viira , fig. 16:23
2001     Eoplacognathus pseudoplanus (Viira, 1972) — Viira et al. , pp. 708
2011     Eoplacognathus pseudoplanus (Viira, 1972) — Viira , fig. 5
2012     Eoplacognathus pseudoplanus (Viira, 1972) — Hints, O. et al. , fig. 5
2018     Eoplacognathus pseudoplanus  — Wu et al. 
Selection of related publications
Kukk, R. 2014. Kesk-Ordoviitsiumi konodondid Aseri paemurrus, Kirde-Eestis: taksonoomia, levik ja biostratigraafia [Magistritöö. Juhendaja: O. Hints, kaasjuhendaja: V. Viira]. pp. 1-60.  Tallinna Tehnikaülikooli geoloogia instituut. 
Männik, P., Viira, V. 2012. Ordovician conodont diversity in the northern Baltic.  Estonian Journal of Earth Sciences   61,   1,   1-14.  Estonian Academy Publishers.  DOI:10.3176/earth.2012.1.01
Hints, O., Viira, V., Nõlvak, J. 2012. Darriwilian (Middle Ordovician) conodont biostratigraphy in NW Estonia.  Estonian Journal of Earth Sciences   61,   4,   210-226. DOI:10.3176/earth.2012.4.03
Viira, V. 2011. Lower and Middle Ordovician conodonts from subsurface of SE Estonia and adjacent Russia.  Estonian Journal of Earth Sciences   60,   1,   1-21. DOI:10.3176/earth.2011.1.01
Sjöstrand, L. L. M. 2003. Early to early Middle Ordovician conodont biostratigraphy of the Tamsalu drill core, central Estonia.  Examensarbeite i geologi vid Lunds Universitet      156,   1-20.  Lunds Universitet. 
Viira, V., Löfgren, A., Mägi, S., Wickström, J. 2001. An Early to Middle Ordovician succession of conodont faunas at Mäekalda, northern Estonia.  Geological Magazine   138,   6,   699-718. DOI:10.1017/S0016756801005945
Männik, P., Viira, V. 1990. Conodonts.  Field Meeting Estonia 1990. An Excursion Guidebook, pp. 84-90.   Estonian Academy of Sciences. 
Viira, V. 1972. On Symmetry of Some Middle Ordovician Conodonts.  Geologica et Palaeontologica   6,      45-49.
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Klassificering
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Chordata | 
| Class | Conodonta | 
| Family | Polyplacognathidae | 
| Genus | Eoplacognathus | 
| Species | elongatus | 
| lindstroemi | |
| pseudoplanus | |
| suecicus | 
References based on distribution
- Männik & Viira, 2012 Kunda Stage
- Viira, 1972 Ohesaare borehole 508.87 - Kunda Stage