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Heterastridium ✝
Description | Heterastridium is an extinct genus of marine hydrozoan. It is the only accepted genus in the monotypic family Heterastridiidae. The fossils date from the Upper Triassic. They are mostly discoid or spherical and some forms found in the Karakorum mountains are called Karakorum stones. They vary in diameter from 1 to 35 cm and appear to follow Cope's rule for the prehistoric climate. From Wikipedia article at https://en.wikipedia.org/wiki/Heterastridium, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | ||||||||||||||||||||||||||||||
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Source Data |
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Rank | genus | ||||||||||||||||||||||||||||||
Taxonomy (GBIF) | Life : Animalia : Cnidaria : Hydrozoa : Anthoathecata : Heterastridiidae : Heterastridium | ||||||||||||||||||||||||||||||
Taxonomy (PBDB) | Life : Animalia : Cnidaria : Hydrozoa : Milleporina : Heterastrididae : Heterastridium | ||||||||||||||||||||||||||||||
Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||
Classification (PBDB,GBIF) |
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Scientific Name | Heterastridium Reuss, 1865 | ||||||||||||||||||||||||||||||
Name Published In | S. B. Akad. Wiss. Wien, Math.-Naturw. Cl., 51 | ||||||||||||||||||||||||||||||
Opinions (PBDB) |
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Status (PBDB) | extinct | ||||||||||||||||||||||||||||||
Taxon Size (PBDB) | 2 | ||||||||||||||||||||||||||||||
First Recorded Appearance | 269 - 260 Ma Permian | ||||||||||||||||||||||||||||||
Last Recorded Appearance | 209 - 201 Ma Mesozoic | ||||||||||||||||||||||||||||||
Motility | stationary, attached (based on Hydrozoa) | ||||||||||||||||||||||||||||||
Vision | blind (based on Hydrozoa) | ||||||||||||||||||||||||||||||
Diet | carnivore, suspension feeder (based on Hydrozoa) | ||||||||||||||||||||||||||||||
Taphonomy | aragonite (based on Hydrozoa) | ||||||||||||||||||||||||||||||
Primary Reference (PBDB) | J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560 | ||||||||||||||||||||||||||||||
Wikipedia | https://en.wikipedia.org/wiki/Heterastridium |
Fossil Distribution
Subtaxa
Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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Heterastridium conglobatum ✝ species | accepted (GBIF) listed (PBDB) | 21 | 237 Ma Middle Triassic | 209 Ma Late/Upper Triassic |
Synonymy List
Year | Name and Author |
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1865 | Heterastridium Reuss |
1999 | Heterastridium Stanley, Jr. and Senowbari-Daryan p. 797 |
2002 | Heterastridium 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!