Species
Lenodus variabilis (Sergeeva, 1963)
Synonymy list
1963     Ambalodus planus Sergeeva, sp. nov. — Sergeeva , pp. 105, fig. 8:11-15
1963     Amorphognathus variabilis Sergeeva, sp. nov. — Sergeeva , pp. 106, fig. 8:15-17
1974     Amorphognathus variabilis Sergeeva, 1963  — Viira , fig. 7:3,4
1976     Ambalodus planus Sergeeva, 1963 — Viira , pp. 45-46, fig. 6:22-24,27,30
1994     Lenodus variabilis (Sergeeva) — Dzik , pp. 86-88
2018     Lenodus variabilis  — Wu et al. 
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., Zhang, Jianhua 2003. Element association and morphology in some Middle Ordovician platform-equipped conodonts.  Journal of Paleontology   77,   4,   721-737. DOI:10.1017/S0022336000044450
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. 
Sergeeva, S. P. 1963. Lower Ordovician conodonts from the Leningrad region.  Paleontologicheski Zhurnal   1963,   2,   93-108.
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Classification
References based on distribution
- Männik & Viira, 2012 Volkhov Stage
- Sergeeva, 1963a Popovka River, Leningrad Oblast Kunda Stage