Species
Paroistodus originalis (Sergeeva, 1963)
Synonymy list
1963     Oistodus originalis Sergeeva, sp. nov. — Sergeeva , pp. 98, fig. 7:8,9
1971     Oistodus originalis Sergeeva — Lindström , pp. 48, fig. 8
1974     Drepanodus originalis (Sergeeva, 1963) — Viira 
1994     Paroistodus originalis (Sergeeva, 1963) — Löfgren , fig. 6:13-16
1997     Paroistodus originalis (Sergeeva) — Löfgren , pp. 926-927, fig. 1:13-16,18-20,22-33
2000     Paroistodus originalis (Sergeeva) — Albanesi & Barnes , fig. 5.20-5.24
2001     Paroistodus originalis (Sergeeva, 1963) — Rasmussen , pp. 108, fig. 13:6-7
2003     Paroistodus originalis — Tolmacheva et al. , pp. 33
2004     Paroistodus originalis (Sergeeva); — Zhen & Percival , fig. 5A-B
2009     Paroistodus originalis (Sergeeva, 1963) — Zhen et al. , pp. 43, fig. 8A-U
Selection of related publications
Wu, R.-C., Calner, M., Lehnert, O., Lindskog, A., Joachimski, M. 2018. Conodont biostratigraphy and carbon isotope stratigraphy of the Middle Ordovician (Darriwilian) Komstad Limestone, southern Sweden.  GFF   140,   1,   44-54. DOI:10.1080/11035897.2018.1435561
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
Tolmacheva, T., Egerquist, E., Meidla, T., Tinn, O., Holmer, L. 2003. Faunal composition and dynamics in unconsolidated sediments: a case study from the Middle Ordovician of the East Baltic.  Geological Magazine   140,   1,   31-44. DOI:10.1017/S001675680200701X
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
Löfgren, A. 1978. Arenigian and Llanvirnian cocodonts from Jämtland, northern Sweden.  Fossils and Strata   13,      1-129.
Viira, V. 1967. Ordovician conodont succession in the Ohesaare core.  Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология   16,   4,   319-329. DOI:10.3176/chem.geol.1967.4.06
Sergeeva, S. P. 1963. Lower Ordovician conodonts from the Leningrad region.  Paleontologicheski Zhurnal   1963,   2,   93-108.
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Klassificering
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Chordata | 
| Class | Conodonta | 
| Genus | Paroistodus | 
| Species | horridus | 
| numarcuatus | |
| originalis | |
| parallelus | |
| proteus | 
References based on distribution
- Männik & Viira, 2012 Billingen Stage
- Sergeeva, 1963a Popovka River, Leningrad Oblast Volkhov Stage
- Tolmacheva et al., 2003a Putilovo quarry, Leningrad Oblast Volkhov Stage
- Viira, 1974 Jägala waterfall Volkhov Stage
- Viira, 1974 Kaagvere 1 borehole 347.7 - 347.7 Volkhov Stage
- Viira, 1967 Ohesaare borehole 516.24 - 516.9 Volkhov Stage
- Wu et al., 2018 Killeröd quarry, Scania, Sweden