Class
Psammocorallia Seilacher, 1992
Aiheeseen liittyvät julkaisut
Savazzi, E. 2012. A reassessment of the Lower Cambrian psammocoral Spatangopsis costata. Paleontological Research 16, 2, 159-170. DOI:10.2517/1342-8144-16.2.159
Seilacher, A., Goldring, R. 1996. Class Psammocorallia (Coelenterata, Vendian‐Ordovician): Recognition, systematics, and distribution. GFF 118, 4, 207-216. DOI:10.1080/11035899609546256
Jensen, S. 1991. The Lower Cambrian problematicum Spatangopsis costata Torell, 1870. GFF 113, 1, 86-87. DOI:10.1080/11035899109453833
Schmidt, Fr. 1888. Über eine neuentdeckte untercambrische Fauna in Estland. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 36, 2, 1-28.
List of species
1. Protolyellia princeps Torell, 1870 | Dominopol Stage
2. Spatangopsis alata Seilacher, 1996 | Lower Cambrian (old nomenclature)
3. Spatangopsis costata Torell, 1870 | Lükati Formation
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Cnidaria |
| Subphylum | Anthozoa |
| Medusozoa | |
| Class | Hydrozoa |
| Psammocorallia | |
| Genus | Protolyellia |
| Spatangopsis | |
| Class | Scyphozoa |
| Order | Melanoskleritoitidea |
| Genus | Aspidella |
| Byronia | |
| Semenola |