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
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., 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
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.
Puura, I. 1996. Lingulate brachiopods and biostratigraphy of the Cambrian-Ordovician boundary beds in Baltoscandia.Doctoral Thesis , pp. 1-214. Uppsala University.
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
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
Gorjansky, V. J. 1969. Bezzamkovye brahiopody kembrijskih i ordovikskih otloženij severo-zapada Russkoj platformy. pp. 1-176. Nedra.
List of species
1. Ungula convexa Pander, 1830 | Upper Cambrian (old nomenclature)
2. Ungula ingrica (Eichwald, 1829) | Upper Cambrian (old nomenclature)
3. Ungula inornata (Mickwitz, 1896) | Upper Cambrian (old nomenclature)
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Classification
Organism group | Biota |
Kingdom | Animalia |
Phylum | Brachiopoda |
Subphylum | Linguliformea |
Class | Lingulata |
Order | Lingulida |
Superfamily | Linguloidea |
Family | Obolidae |
Subfamily | Obolinae |
Genus | Apatobolus |
Euobolus | |
Expellobolus | |
Foveola | |
Leptembolon | |
Lingulella | |
Mytoella | |
Obolus | |
Oepikites | |
Ralfia | |
Rebrovia | |
Schmidtites | |
Spinilingula | |
Trigonoglossa | |
Ungula | |
Species | convexa |
ingrica | |
inornata | |
triangularis | |
Genus | Westonia |
References based on distribution
- Holmer & Popov, 1990 Upper Cambrian (old nomenclature)
- Yeltyscheva, 1966 Aluvere quarry Idavere Substage
- Nestor, H., 1964a Tamsalu quarry 'Limberg' Juuru Stage
- Nestor, H., 1964a Eiglaküla quarry, Läänemaa Juuru Stage
- Nemliher et al., 2004a Lava River, Leningrad Oblast
- Gorjansky, 1969 Maardu opencast mine Pakerort Stage
- Gorjansky, 1969 Jägala River Pakerort Stage
- Gorjansky, 1969 Iru outcrop Pakerort Stage
- Gorjansky, 1969 Jägala River Pakerort Stage
- Gorjansky, 1969 Maardu opencast mine Pakerort Stage
- Popov & Holmer, 2003 Kallavere Upper Cambrian (old nomenclature)