Naraoia (lat.) - a genus of extinct arthropods from the family Naraoiidae , living from Lower Cambrian to the end of the Silurian .
| † Naraoia | |||||||||||||||||||||||||||||||||||||||||
 Reconstruction of Naraoia spinosa | |||||||||||||||||||||||||||||||||||||||||
| Scientific classification | |||||||||||||||||||||||||||||||||||||||||
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| International scientific name | |||||||||||||||||||||||||||||||||||||||||
Naraoia Walcott , 1912 | |||||||||||||||||||||||||||||||||||||||||
| Geochronology 529-419 Ma
◄ Nowadays◄ Cretaceous-Paleogene extinction◄ Triassic extinction◄ Mass Permian Extinction◄ Devonian extinction◄ Ordovician-Silurian extinction◄ Cambrian explosion | |||||||||||||||||||||||||||||||||||||||||
Content
- 1 Etymology
- 2 Study History
- 3 Description
- 4 Classification
- 5 See also
- 6 notes
Etymology
The name comes from the toponym Narao, the name of a group of small lakes in the canyon Cataract Brook (English) , next to the Canadian Pacific Railway, British Columbia ( Canada ) [1] .
Study History
Representatives of the genus were first described from the well-known location of the Burgess shales in Canada. Initially, Naraoia were described as crustaceans . Their dense carapace hid the internal structures necessary for a more accurate classification. Later, the famous paleontologist , who analyzed more material, found that the legs (and gills) of Naraoia are very morphologically similar to the trilobites , to which they belonged [2] .
Description
They are characterized by a small body size (2-4.5 cm).
Classification
The genus includes 5 extinct species :
- Naraoia bertiensis Caron, Rudjin & Millken 2004
- Naraoia compacta Walcott, 1912
- Naraoia spinifer Walcott, 1931
- Naraoia spinosa Zhang & Hou, 1985
- Naraoia tianjiangensis Peng, Zhou & Sun 2012
See also
- Burgess Shale Fauna
Notes
- ↑ Walcott CD Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata. In: Cambrian Geology and Paleontology II. - Smithsonian, 1914.
- ↑ Whittington HB The Middle Cambrian trilobite Naraoia, Burgess Shale, British Columbia (Eng.) // Philosophical Transactions of the Royal Society of London, series B, 280. - 1977. - P. 409-443 .