Brachiopoda

Helmersenia ladogensis (Jeremejew, 1856)

Type specimen data
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Synonymy list
1856     Siphonotreta ladogensis sp. nov. — Jeremejew, pp. 73, fig. 5a-c
1860     Helmersenia ladogensis (Jeremejew) — Pander, fig. 2:2-a-g
1861     Siphonotreta ladogensis — Eichwald, pp. 262
1969     Helmersenia ladogensis (Jeremejew, 1856) — Gorjansky, pp. 99, fig. 19:1-21
1973     Helmersenia cf. ladogensis (Jeremejew, 1856) — Biernat, pp. 110, fig. 33:1-7, text fig. 40
2000     Helmersenia ladogensis (Jeremejew) — Holmer & Popov, pp. 143, fig. 79:3a-e
Selection of related publications
Nemliher, J., Kurvits, T., Kallaste, T., Puura, I. 2004. Apatite varieties in the shell of the Cambrian lingulate brachiopod Obolus apollinis Eichwald. Proceedings of the Estonian Academy of Sciences. Geology 53, 4, 246-256.
Puura, I. 1996. Lingulate brachiopods and biostratigraphy of the Cambrian-Ordovician boundary beds in Baltoscandia. Doctoral Thesis, pp. 1-214.
Popov, L. E., Khazanovitch, K. K., Borovko, N. G., Sergejeva, S. P., Sobolevskaya, R. F. 1989. The key sections and stratigraphy of the Cambrian-Ordovician phosphate-bearing Obolus beds on the north-east Russian Platform. Опорные разрезы и стратиграфия, pp. 1-222.
Kaljo, D., Borovko, N., Heinsalu, H. Khazanovich, K., Mens, K., Popov, L., Sergejeva, S., Sobolevskaya, R., Viira, V. 1986. The Cambrian-Ordovician boundary in the Baltic-Ladoga clint area (North Estonia and Leningrad Region, USSR). Proceedings of the Academy of Sciences of the Estonian SSR. Geology 35, 3, 97-108.
Gorjansky, V. J. 1969. Inarticulate brachiopods of the Cambrian and Ordovician of the northwest Russian Platform.
References based on distribution