Tuzoia polleni
| Tuzoia polleni | ||||||||
|---|---|---|---|---|---|---|---|---|
Tuzoia polleni |
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| Temporal occurrence | ||||||||
| middle Cambrian | ||||||||
| 509 to 497 million years | ||||||||
| Locations | ||||||||
| Systematics | ||||||||
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| Scientific name | ||||||||
| Tuzoia polleni | ||||||||
| Resser , 1929 | ||||||||
Tuzoia polleni is an extinct species from the genus Tuzoia with an uncertain position within the arthropods (Arthropoda).
features
Tuzoia polleni had an egg-shaped outline (length to height ratio about 1.45 in the holotype ) and a carapace length of about 100 mm. The upper edge was straight to slightly convex and had up to 7 spines on each side. The front rostrum was broad and slightly overhanging. The notch was flat. The rear rostrum was also wide and small. There was a central thorn and one on the belly side on the rear edge, both of which were very short. There were two other small spines. There were other tiny thorns at the bottom. The side elevation between the upper and lower edge ran diagonally and had 7 to 9 large triangular spines. The net-like structure of the surface stretched over the entire tank and was tightly meshed in isolated places.
Locations
The species was found in the Eager Formation in British Columbia , Canada and, when synonyms are used, in Vermont , Pennsylvania and Nevada in the United States .
Systematics
The species was first described by Charles Elmer Resser in 1929 . Lieberman 2003 regards T. getzi Resser, 1929 , T. nitida Resser & Howell, 1938 , T. nodosa Resser, 1929 , T. spinosa Resser, 1929 and T. vermontensis Resser & Howell, 1938 as synonyms of Tuzoia polleni .
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literature
- I. Chlupáč, V. Kordule: Arthropods of Burgess Shale type from the Middle Cambrian of Bohemia (Czech Republic) . Bulletin of the Czech Geological Survey, Vol. 77 (3), 2002: 167-182. PDF
- J. Vannier, J.-B. Caron, Yuan J.-L., DEG Briggs, D. Collins, Zhao Y.-L., Zhu M.-Y .: Tuzoia: Morphology and Lifestyle of a Large Bivalved Arthropod of the Cambrian Seas . Journal of Paleontology 81 (3), 2007: 445-471. HTML