Selection of related publications
Vinn, O., Ernst, A., Wilson, M. A., Toom, U. 2019. Symbiosis of conulariids with trepostome bryozoans in the Upper Ordovician of Estonia (Baltica). Palaeogeography, Palaeoclimatology, Palaeoecology 518, 89-96. DOI:10.1016/j.palaeo.2019.01.018
Obut, A. M. 1960. Correlation of some parts of Estonian Ordovician and Silurian deposits according to graptolites. ENSV TA Geoloogia Instituudi uurimused V, 143-157.
Obut, A., Rytzk, G. 1958. Ordovician and Silurian Dendroidea of Estonia. ENSV TA Geoloogia Instituudi uurimused III, 125-143.
Öpik, A. 1930. Beiträge zur Kenntnis der Kukruse-(C2-C3-)Stufe in Eesti. IV. Tartu Ülikooli Geoloogia Instituudi Toimetused 24, 1-34.
Öpik, A. 1928. Beiträge zur Kenntnis der Kukruse-(C2-C3-) Stufe in Eesti. III. Tartu Ülikooli Geoloogia Instituudi Toimetused 12, 1-42.
List of species
1. Hormograptus cervus (Obut et Rytzk, 1958) | Vormsi Stage
2. Hormograptus densitubularis (Obut, 1960) | Porkuni Stage
4. Hormograptus ramulus (Öpik, 1928) | Kukruse Stage
5. Hormograptus sphaericola (Öpik, 1928) | Kukruse Stage
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Classification
Organism group | Biota |
Kingdom | Animalia |
Phylum | Hemichordata |
Class | Pterobranchia |
Subclass | Graptolithina |
Family | Wimanicrustidae |
Supergenus | Urbanekicrusta |
Genus | Bulmanicrusta |
Ellesicrusta | |
Graptoblastoides | |
Graptoblastus | |
Holmicrusta | |
Hormograptus | |
Species | cervus |
densitubularis | |
luhai | |
ramulus | |
sphaericola | |
Genus | Lapworthicrusta |
Maenniligraptus | |
Ruedemannicrusta | |
Thallograptus | |
Wimanicrusta | |
Xenocyathus |
References based on distribution
- Obut & Rytzk, 1958 Ristna, Hiiumaa Jõhvi Substage
- Obut & Rytzk, 1958 Saxby Vormsi Stage
- Obut, 1960 Porkuni quarry Porkuni Stage
- Öpik, 1928a Lilli quarry Keila Stage
- Öpik, 1928a Vanamõisa, Harjumaa Kukruse Stage