Species
Periodon flabellum (Lindström, 1954)
Synonymy list
1954     Prioniodina inflata n. sp. — Lindström , pp. 588, fig. 6:26?,27
1954     Trichonodella flabellum n. sp. — Lindström , pp. 599, fig. 6:28-30
1954     Prioniodina? deflexa n. sp. — Lindström , pp. 586, fig. 6:32-35 only
1954     Prioniodina? deflexa Lindström , 1955 — Lindström , fig. 4:10 only
1954     Oistodus selene n. sp. — Lindström , pp. 580, fig. 4:19-20
1967     Prioniodina inflata Lindström , 1955 — Viira , fig. 1:4
1967     Trichonodella flabellum Lindström , 1955 — Viira , fig. 1:1 only
1967     Prioniodina? deflexa Lindström, 1955 — Viira , fig. 1:2
1971     Periodon flabellum (Lindström) — Lindström , pp. 57, fig. 18
1974     Prioniodina inflata Lindström , 1955 — Viira , fig. 4:18-20
Selection of related publications
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
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
Löfgren, A., Viira, V., Mens, K. 2005. Conodont biostratigraphy and sedimentary history in the upper Tremadoc at Uuga, Cape Pakri, NW Estonia.  GFF   127,   4,   283-293. DOI:10.1080/11035890501274283
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.
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Klassificering
References based on distribution
- Männik & Viira, 2012 Billingen Stage
- Tolmacheva et al., 2003a Putilovo quarry, Leningrad Oblast Volkhov Stage