Genus
Helicelasma Neuman, 1969
Selection of related publications
Vinn, O., Liang, K., Toom, U. 2017. Endobiotic rugose coral symbionts in Silurian tabulate corals from Estonia (Baltica).  Palaios   32,   3,   158-165. DOI:10.2110/palo.2016.084
Neuman, B. 1969. Upper Ordovician Streptelasmatid Corals from Scandinavia.  Bulletin of the Geological Institutions of the University of Uppsala   1,   1,   1-73.
Reiman, V. M. 1958. New rugose corals from upper Ordovician and Llandoverian deposits of Baltic.  ENSV TA Geoloogia Instituudi Uurimused   II,      33-47.
List of species
1. Helicelasma bystrowi (Reiman, 1958) | Vormsi Stage
2. Helicelasma poulseni (Cox, 1937) | Pirgu Stage
3. Helicelasma simplex Neuman, 1969 | Upper Ordovician
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Cnidaria | 
| Subphylum | Anthozoa | 
| Subclass | Rugosa | 
| Order | Stauriida | 
| Suborder | Streptelasmatina | 
| Family | Streptelasmatidae | 
| Subfamily | Streptelasmatinae | 
| Genus | Axolasma | 
| Bighornia | |
| Borelasma | |
| Densigrewingkia | |
| Densiphyllum | |
| Eurogrewingkia | |
| Fosselasma | |
| Grewingkia | |
| Helicelasma | |
| Species | bystrowi | 
| poulseni | |
| simplex | |
| Genus | Heterophrentis | 
| Kaljolasma | |
| Kenophyllum | |
| Leolasma | |
| Lobocorallium | |
| Rectigrewingkia | |
| Rhegmaphyllum | |
| Streptelasma | |
| Tungussophyllum | |
| Ullernelasma | 
References based on distribution
- Neuman, 1969 Borenshult Upper Ordovician
- Neuman, 1969 Borenshult Upper Ordovician