Guangweicaris
| Guangweicaris | ||||||||
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| Temporal occurrence | ||||||||
| Lower Cambrian | ||||||||
| 525 to 520 million years | ||||||||
| Locations | ||||||||
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| Systematics | ||||||||
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| Scientific name of the family | ||||||||
| Guangweicarididae | ||||||||
| Luo , Fu & Hu , 2007 | ||||||||
| Scientific name of the genus | ||||||||
| Guangweicaris | ||||||||
| Luo , Fu & Hu , 2007 | ||||||||
Guangweicaris is a genus with an uncertain position within the arthropods (Arthropoda). The name is composed of Guangwei , the name of a village near the site, and the ending -caris for shrimp-like .
features
The shrimp-like body consists of 13 tergites divided into 3 parts: the head shield ( cephalon ) consists of 3, the thorax of 4 and the abdomen of 6 tergites. There is also an acron on the head shield and a telson on the abdomen . All thoracic and abdominal entergites have central spines.
Locations
In 2005, more than 100 specimens of this genus were found in the Wulongqing Formation at the foot of Shitangshan Mountain near Guangwei Village, southeast of Kunming , Yunnan Province . Finds in Gangtoucun, north of Kunming, and Lihuazhuang, Yiliang County , were very rare.
Systematics
The position within the arthropods is not exactly clear. A systematic classification within the already known Chengjiang and Burgess fossils is also difficult. Guangweicaris shows similarities with Chengjiangocaris Hou & Bergström, 1991 from the order Fuxianhuiida Bousfield, 1995, but due to the different number of cephalonic ergites and the ambiguous three-part separation of the body, the genus was placed in its own family Guangweicarididae Luo, Fu & Hu, 2007 .
Only one species is currently described:
- Guangweicaris spinatus Luo, Fu & Hu, 2007
literature
- Luo et al .: A New Arthropod, Guangweicaris Luo, Fu et Hu gen. Nov. from the Early Cambrian Guanshan Fauna, Kunming, China . Acta Geologica Sinica, vol. 81, no. 1, pp. 1-7. PDF