Paropsonemid
| Paropsonemid Temporal range: Chengjiang–Early Devonian[1] | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Stem-group: | Ambulacraria |
| Clade: | †Cambroernida |
| Family: | †Eldoniidae |
| Clade: | †Paropsonemida |
The paropsonemids are problematic fossils known from the Ordovician to Devonian periods, which may be related to the Cambrian eldoniids.[2] They are typified by the Chengjiang genus Paropsonema.
References
- ↑ Conway Morris, S. (1993). "The fossil record and the early evolution of the Metazoa". Nature. 361 (6409): 219–225. Bibcode:1993Natur.361..219M. doi:10.1038/361219a0.
- ↑ D. Friend; A. Yu. Zhuravlev & I. A. Solov’ev (2002). "Middle Cambrian Eldonia from the Siberian Platform". Paleontological Journal. 36 (1): 20–24.
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