''Rugosusivitta orthogonia'' is a fossil ribbon-shaped bilaterian, found just above the
Ediacaran-Cambrian line in
Yunnan
Yunnan; is an inland Provinces of China, province in Southwestern China. The province spans approximately and has a population of 47.2 million (as of 2020). The capital of the province is Kunming. The province borders the Chinese provinces ...
. It has been interpreted as a
stem group
In phylogenetics, the crown group or crown assemblage is a collection of species composed of the living representatives of the collection, the most recent common ancestor of the collection, and all descendants of the most recent common ancestor. ...
to
Platyhelminthes.
It shares similarities with present-day
Cestodians.
References
Cambrian invertebrates
Cambrian first appearances
Fossils of China
Cambrian animals
Fossil taxa described in 2020
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