Selection of related publications
Vinn, O., Holmer, L. E., Wilson, M. A., Isakar, M., Toom, U. 2021. Possible drill holes and pseudoborings in obolid shells from the Cambrian/Ordovician boundary beds of Estonia and the uppermost Cambrian of NW Russia. Historical Biology 33, 12, 3579–3584. DOI:10.1080/08912963.2021.1878355
Holmer, L. E., Popov, L. E., Ghobadi Pour, M., Zhang, Z., Zhang, Z. 2017. Unusual pitted Ordovician brachiopods from the East Baltic: the significance of coarsely pitted ornamentations in linguliforms. Papers in Palaeontology 3, 3, 387-399. Wiley. DOI:10.1002/spp2.1080
Lang, L., Kirsimäe, K., Vahur, S. 2016. Diagenetic fate of bioapatite in linguliform brachiopods: multiple apatite phases in shells of Cambrian lingulate brachiopod Ungula ingrica (Eichwald). Lethaia 49, 1, 13-27. Wiley. DOI:10.1111/let.12127
Lang, L. 2015. Baculate shell structure in Early Palaeozoic linguliform brachiopods. Dissertationes Geologicae Universitatis Tartuensis 40, 1-113. University of Tartu Press.
Lang, L., Puura, I. 2013. Phosphatized organic nanostructures in the Cambrian linguloid brachiopod Ungula inornata (Mickwitz). Estonian Journal of Earth Sciences 62, 3, 121-130. DOI:10.3176/earth.2013.10
Lang, L., Uibopuu, E., Puura, I. 2011. Nanostructures in Palaeozoic linguloid brachiopods. Memoirs of the Association of Australasian Palaeontologists 41, 359−366.
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. DOI:10.3176/geol.2004.4.02
Popov, L. E., Holmer, L. E. 2003. Understanding linguloid brachiopods: Obolus and Ungula as examples. Carnets de Géologie 6, 1-13.
Holmer, L. E., Popov, L. E. 2000. Class Lingulata.Treatise on Invertebrate Paleontology, part H Brachiopoda , pp. 30-146.
Puura, I. 1996. Lingulate brachiopods and biostratigraphy of the Cambrian-Ordovician boundary beds in Baltoscandia.Doctoral Thesis , pp. 1-214. Uppsala University.
Popov, L., Holmer, L. E. 1994. Cambrian-Ordovician lingulate brachiopods from Scandinavia, Kazakhstan, and South Ural Mountains. Fossils and Strata 35, 1-156. DOI:10.1111/j.1502-3931.1994.tb01571.x
Holmer, L. E., Popov, L. E. 1994. Revision of the type species of Acrotreta and related Lingulate brachiopods. Journal of Paleontology 68, 3, 433-450. DOI:10.1017/S002233600002583X
Holmer, H., Popov, L. E. 1990. The acrotretacean brachiopod Ceratreta tanneri (Metzger) from the Upper Cambrian of Baltoscandia. GFF 112, 3, 249-263. DOI:10.1080/11035899009454772
Popov, L. E., Khazanovich, K. K. 1989. Lingulata (inarticulate brachiopods with phosphate-calcium shell).The Key sections and stratigraphy of the phosphate bearing Obolus beds of the North-East of the Russian platform , pp. 96-136. Nauka.
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). Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 35, 3, 97-108. DOI:10.3176/geol.1986.3.01
Khazanovich, K. K., Popov, L. E., Melnikova, L. M. 1984. Bezzamkovye brahiopody, ostrakody (bradoriidy) i hiolitel'minty iz sablinskoj svity Leningradskoj oblasti. Paleontologicheski Zhurnal 4, 33-47.
Biernat, G. 1973. Ordovician Inarticulate Brachiopods from Poland and Estonia. Palaeontologia Polonica 28, 1-116.
Gorjansky, V. J. 1969. Bezzamkovye brahiopody kembrijskih i ordovikskih otloženij severo-zapada Russkoj platformy. pp. 1-176. Nedra.
Eichwald, E. 1860. Lethaea Rossica ou Paléontologie de la Russie. Premier volume. Ancienne Période en deux sections. pp. XIX+1–1657. E. Schweizerbart. DOI:10.5962/bhl.title.52391
List of species
1. Apatobolus plicatus Popov, 1980 | Ordovician
3. Expellobolus tetragonus (Gorjansky, 1969) | Hunneberg Stage
4. Foveola ivari Holmer, Popov, Ghobadi Pour, Zhang et Zhang, 2017 | Kukruse Stage
5. Foveola maarduensis Gorjansky, 1969 | Hunneberg Stage
7. Leptembolon recta Gorjansky, 1969 | Leetse Formation
8. Lingulella alata Holmer, 1989 | Ordovician
9. Lingulella antiquissima (Jeremejew, 1856) | Tremadocian
14. Obolus ruchini Khazanovitch et Popov, 1984 | Baltic Middle Cambrian
15. Obolus transversus (Pander, 1830) | Baltic Middle Cambrian
17. Oepikites fragilis Popov et Khazanovitch, 1989 | Upper Cambrian (old nomenclature)
18. Oepikites koltchanovi Khazanovitch et Popov, 1984 | Middle Cambrian (old nomenclature)
19. Oepikites macilentus Khazanovitch et Popov, 1984 | Baltic Middle Cambrian
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Classification
Organism group | Biota |
Kingdom | Animalia |
Phylum | Brachiopoda |
Subphylum | Linguliformea |
Class | Lingulata |
Order | Lingulida |
Superfamily | Linguloidea |
Family | Obolidae |
Subfamily | Elliptoglossinae |
Glossellinae | |
Obolinae | |
Genus | Apatobolus |
Euobolus | |
Expellobolus | |
Foveola | |
Leptembolon | |
Lingulella | |
Mytoella | |
Obolus | |
Oepikites | |
Ralfia | |
Rebrovia | |
Schmidtites | |
Spinilingula | |
Trigonoglossa | |
Ungula | |
Westonia | |
Schizotreta |