Kongqiangheia
| Kongqiangheia Temporal range: late Caradoc | |
|---|---|
 | |
| K. rotundata | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Trilobita |
| Order: | Asaphida |
| Suborder: | Trinucleina |
| Family: | Raphiophoridae |
| Subfamily: | Raphiophorinae |
| Genus: | Kongqiangheia Zhang, 1988[1] |
| Species: | K. rotundata |
| Type species | |
| Kongqiangheia rotundata | |
Kongqiaoheia rotundata is an asaphid trilobite of the family Raphiophoridae that lived during the late Caradoc of Inner Mongolia, China. K. rotundata was originally grouped with the so-called Taklamakaniinae, a paraphyletic group of tiny, dwarfed raphiophorids that lived in a deepwater environment in what is now the Tarim Basin, including Pseudampyxina, Nanshanaspis, and Taklamakania. Like these other genera, K. rotundata has only three thoracic segments, probably due to paedomorphic dwarfism: other raphiophorid trilobites have at minimum five thoracic segments.[2]
Morphology
As with other "taklamakaniids," K. rotundata had a disk-shaped body with a semi-circular cephalon, a bulbous glabellum, and a pair of very long, thin, librigenial spines emanating from the lateral corners of the cephalon. There are a pair of bulbous structures on the pygidium. K. rotundata differs from Taklamakania by lacking a spine on the anterior of the glabellum. It differs from Nanshanaspis in the shapes of the cephalon, glabellum, pygidium and the various glabellal and pygidial furrows. K. rotundata differs from Pseudampyxina in that the former's glabellum does not protrude anteriorially as the latter's.[1]
References
- 1 2 Tairong, Zhang. "NEW MATERIALS OF TAKLAMAKANIINAE FROM THE MIDDLE ORDOCICIAN OF XINJIANG." Xinjiang Geology 4 (1988): 004.
- ↑ Zhou, Z.; Webby, B.D.; Yuan, W. (1995). "Ordovician trilobites from the Yingan Formation of northwestern Tarim, Xinjiang, northwestern China". Alcheringa: An Australasian Journal of Palaeontology 19 (1): 47–72. doi:10.1080/03115519508619098.