Siphonotretida Kühn, 1949

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.
Holmer, L. E. & Biernat, G. 2002. Lingulate brachiopods from Lower Ordovician (Tremadoc) chalcedonites, Holy Cross Mountains, Poland. Acta Palaeontologica Polonica 47, 1, 141-156.
Holmer, L. E. & Popov, L. E. 2000. Class Lingulata. Treatise on Invertebrate Paleontology, part H Brachiopoda, pp. 30-146.
Wright, A. D. & Nõlvak, J. 1997. Functional significance of the spines of the Ordovician lingulate brachiopod Acanthambonia. Palaeontology 40, 1, 113-119.
Puura, I. 1996. Lingulate brachiopods and biostratigraphy of the Cambrian-Ordovician boundary beds in Baltoscandia. Doctoral Thesis, pp. 1-214.
Holmer, L. E. 1989. Middle Ordovician phosphatic inarticulate brachiopods from Västergötland and Dalarna, Sweden. Fossils and Strata , 26, 1-172.
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.
Popov, L. & Nõlvak, J. 1987. Revision of the morphology and systematic position of the genus Acanthambonia (Brachiopoda, Inarticulata). Proceedings of the Academy of Sciences of the Estonian SSR. Geology 36, 1, 14-19.
Kaljo, D., Borovko, N., Heinsalu, H. Khazanovich, K., Mens, K., Popov, L., Sergejeva, S., & Sobolevskaja, R. 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.