| Hallidaya brueri Temporal range: Late Ediacaran, around
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| Artist's restoration of H. brueri[1] | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | †Trilobozoa |
| Class: | †Cyclozoa |
| Genus: | †Hallidaya J.J. Sepkoski 2002 |
| Species: | †H. brueri
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| Binomial name | |
| †Hallidaya brueri Wade 1969
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The Ediacaran fossil Hallidaya, a close relative of Skinnera lived in Belomorian (559-550 Ma) of the Late Ediacaran period prior to the Cambrian explosion and thrived in the marine strata on the ocean floor of what is now considered Australia. These fossils were disk-shaped organisms that were slightly dome shaped with tri-radial symmetry. These Ediacaran organisms thrived by living in low-energy inner shelf, in the wave- and current-agitated shoreface, and in the high-energy distributary systems.[2]
- ^ Apokryltaros at English Wikipedia (2006). "Tribrachiidae.jpg".
- ^ Grazhdankin, Dmitriy (2014). "Patterns of Evolution of the Ediacaran Soft-Bodied Biota". Journal of Paleontology. 88 (2): 269–283. doi:10.1666/13-072.