Xianguangia sinica Primitive Sea Anemone from Chengjiang Biota

Xianguangia sinica

Phylum Cnidaria

Geological Time: Early Cambrian (~525 million years ago)

Size: 19 mm long, 11 mm across on a 40 mm by 30 mm matrix.

Fossil Site: Chengjiang Biota: Quiongzhusi Section, Yu’anshan Member, Heilinpu Formation, Mafang, Anning, Kunming, Yunnan Province, China

Xianguangia sinica Primitive Sea Anemone from Chengjiang Biota While some researchers place this Xianguangia sinica in the Ctenophora, the original describers believe it is an early Cnidaian, a sea anemone much like those to come later; the striated stem and rounded base are suggestive of such an assignment. This specimen is the result of over 3 months of field work in an attempt to locate an area preserving these ancient creatures. Found only among the Chengjiang biota, Xianguangia is known from less than 100 specimens, and is but one of two taxa thought to represent the Phylum Cnidaria within this Early Cambrian faunal assemblage.

Also see: Chengjiang Fauna

click fossil pictures to enlarge

Fossil Museum Navigation:
Geological Time Paleobiology Geological History Tree of Life
Fossil Sites Fossils Evolution Fossil Record Museum Fossils