Kingdom Animalia Phylum Hemichordata | Class Pterobranchia Rank Genus | |
Similar Marpolia, Margaretia, Selkirkia, Branchiocaris, Cambrorhytium |
Yuknessia test
Yuknessia is an early pterobranch, known from the Burgess shale, the Chengjiang and the Wheeler shale. Long, unbranched fronds emerge from a central holdfast-like body covered in small conical plates. 23 specimens of Yuknessia are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community. The genus contains two species: the type species Y. simplex and Y. stephenensis It was originally interpreted as a green alga, and has since been reinterpreted it as a colonial pterobranch.
References
Yuknessia Wikipedia(Text) CC BY-SA