| 词条 | Paropsonemid |
| 释义 |
| fossil_range = {{fossil range|Early Cambrian|Early Devonian|ref=[1]}} | display_parents = 3 | taxon = Paropsonemida | authority = }} The paropsonemids are problematic fossils known from the Early Cambrian to Devonian periods, which may be related to the Cambrian eldoniids.[2] They are typified by the Chengjiang genus Paropsonema. References1. ^{{Cite journal| doi = 10.1038/361219a0| title = The fossil record and the early evolution of the Metazoa| year = 1993| url = https://books.google.com/books?id=ND71kyPhEn8C&pg=PA128#v=onepage&f=false| last1 = Conway Morris | first1 = S.| journal = Nature| volume = 361| pages = 219–225|bibcode = 1993Natur.361..219M | issue=6409}} {{ordovician-animal-stub}}{{silurian-animal-stub}}{{devonian-animal-stub}}2. ^{{cite journal |url = http://www.maik.ru/abstract/paleng/2/paleng1_2p20abs.htm |title = Middle Cambrian Eldonia from the Siberian Platform |author1 = D. Friend |author2 = A. Yu. Zhuravlev |author3 = I. A. Solov’ev |last-author-amp = yes |journal = Paleontological Journal |year = 2002 |volume = 36 |issue = 1 |pages = 20–24 |deadurl = yes |archiveurl = https://web.archive.org/web/20160303191129/http://www.maik.ru/abstract/paleng/2/paleng1_2p20abs.htm |archivedate = 2016-03-03 |df = }} 4 : Ordovician invertebrates|Devonian animals|Cambrian first appearances|Early Devonian extinctions |
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