Fossil evidence unveils an early Cambrian origin for Bryozoa

@article{Zhang2021FossilEU,
  title={Fossil evidence unveils an early Cambrian origin for Bryozoa},
  author={Zhiliang Zhang and Zhifei Zhang and Junye Ma and Paul D. Taylor and Luke C. Strotz and Sarah M. Jacquet and Christian B. Skovsted and Feiyang Chen and Jian Han and Glenn A. Brock},
  journal={Nature},
  year={2021},
  volume={599},
  pages={251 - 255}
}
Bryozoans (also known as ectoprocts or moss animals) are aquatic, dominantly sessile, filter-feeding lophophorates that construct an organic or calcareous modular colonial (clonal) exoskeleton1–3. The presence of six major orders of bryozoans with advanced polymorphisms in lower Ordovician rocks strongly suggests a Cambrian origin for the largest and most diverse lophophorate phylum2,4–8. However, a lack of convincing bryozoan fossils from the Cambrian period has hampered resolution of the true… 
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