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Helicelasma ✝
| Source Data |
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| Rank | genus | |||||||||||||||||||||||||||||||||
| Taxonomy (GBIF) | Life : Animalia : Cnidaria : Anthozoa : Streptelasmatidae : Helicelasma | |||||||||||||||||||||||||||||||||
| Taxonomy (PBDB) | Life : Animalia : Cnidaria : Anthozoa : Stauriida : Streptelasmatidae : Helicelasma | |||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Helicelasma Neuman, 1969 | |||||||||||||||||||||||||||||||||
| Name Published In | Bull. Geol. Instn Univ. Upsala (N. S.) 1 | |||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 6 | |||||||||||||||||||||||||||||||||
| First Recorded Appearance | 458 - 450 Ma Ordovician | |||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 443 - 433 Ma Silurian | |||||||||||||||||||||||||||||||||
| Motility | stationary, attached (based on Rugosa) | |||||||||||||||||||||||||||||||||
| Vision | blind (based on Anthozoa) | |||||||||||||||||||||||||||||||||
| Diet | suspension feeder (based on Rugosa) | |||||||||||||||||||||||||||||||||
| Taphonomy | low Mg calcite (based on Rugosa) | |||||||||||||||||||||||||||||||||
| Primary Reference (PBDB) | B. Neuman. 1969. Upper Ordovician Streptelasmatid Corals from Scandinavia. Publications from the Palaeontological Institution of the University of Uppsala 77:1-73 |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
|---|---|---|---|---|---|
| Helicelasma fossulatum ✝ species | listed (PBDB) | ||||
| Helicelasma giganteum ✝ species | listed (PBDB) | ||||
| Helicelasma rusticum ✝ species | listed (PBDB) | 21 | 458 Ma Middle Ordovician | 450 Ma Late/Upper Ordovician | |
| Helicelasma simplex ✝ species | accepted (GBIF) listed (PBDB) | 5 | 446 Ma Late/Upper Ordovician | 445 Ma Late/Upper Ordovician | |
| Helicelasma whittardi ✝ species | listed (PBDB) | 2 | 443 Ma Silurian | 443 Ma Silurian | |
| Streptelasma fossulatum species | accepted (GBIF) | No associated record in PBDB | |||
| Streptelasma giganteum species | accepted (GBIF) | No associated record in PBDB | |||
| Streptelasma rusticum species | accepted (GBIF) | No associated record in PBDB | |||
| Streptelasma whittardi species | accepted (GBIF) | No associated record in PBDB | |||
Synonymy List
| Year | Name and Author |
|---|---|
| 1969 | Helicelasma Neuman |
| 2002 | Helicelasma Sepkoski, Jr. |
References
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
