Heterastridium
| Heterastridium | |
|---|---|
 | |
| Some Karakorum stones (labelled as Stoliczkaria and Syringosphaera) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Subkingdom: | Eumetazoa |
| Phylum: | Cnidaria |
| Subphylum: | Medusozoa |
| Genus: | Heterastridium |
Heterastridium is a genus of fossil marine Hydrozoan from the Upper Triassic. They are mostly discoid or spherical and some forms found in the Karakorum mountains are called Karakorum stones.[1] They vary in diameter from 1 to 35 cm and appear to follow Cope's rule for the prehistoric climate.
References
- ↑ Erik Flügel (1960) Heterastridium conglobatum conglobatum Reuss, an Upper Triassic Hydrozoan from the Petra-Tou-Roumiou Limestone of Pendakomo, Cyprus. Journal of Paleontology 34(1):127-132
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