122/4: Arenig, Australia
collected 1976
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Asaphida
- Asaphidae
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Fitzroyaspis irritans
Fortey and Shergold 1984
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| recombined as Eisarkaspis irritans | ||||||||||
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Norasaphus vesiculosus
Fortey and Shergold 1984
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| subgenus Norasaphites | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Australia | State/province: | Northern Territory |
| Coordinates: | 22.9° South, 137.8° East (view map) | ||
| Paleocoordinates: | 20.0° North, 170.8° East | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician |
| 10 m.y. bin: | Ordovician 2 |
| Key time interval: | Arenig |
| Age range of interval: | 477.70000 - 468.40000 m.y. ago |
Lithology and environment
| Primary lithology: | fine sandstone |
| Includes fossils? | Y |
| Environment: | shallow subtidal indet. |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | mesofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Reason for describing collection: | biostratigraphic analysis | Collection dates: | 1976 |
| Taxonomic list comments:brachiopods, gastropods, nautiloids, bivalves also present | |
Metadata
| Database number: | 157057 | ||
| Authorizer: | M. Hopkins | Enterer: | M. Hopkins |
| Modifier: | M. Hopkins | Research group: | marine invertebrate |
| Created: | 2014-06-05 12:13:43 | Last modified: | 2014-06-05 12:48:50 |
| Access level: | the public | Released: | 2014-06-05 12:13:43 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 51493. | R. A. Fortey and J. H. Shergold. 1984. Early Ordovician trilobites, Nora Formation, central Australia. Palaeontology 27:315-366 [M. Hopkins/M. Hopkins/M. Hopkins] |