لافكيات: الفرق بين النسختين

| fossil_range = {{fossil range|530|0|ref=<ref name=Xian-guang2002>{{Cite journal | lastالأخير = Xian-guang | firstالأول = H. | coauthorsالمؤلفين المشاركين =Richard J. Aldridge2, David J. Siveter2,Derek J. Siveter3,4 and Feng Xiang-hong | yearالسنة = 2002 | titleالعنوان = New evidence on the anatomy and phylogeny of the earliest vertebrates | journal = Proceedings of the Royal Society B: Biological Sciences | volume = 269 | issue = 1503 | pagesالصفحات = 1865–1869 | doi = 10.1098/rspb.2002.2104 | urlالمسار = http://journals.royalsociety.org/index/JA88X875KH2VC0E8.pdf|formatالتنسيق=PDF | pmid = 12350247 | pmc = 1691108 | postscript = <!--None-->}}</ref>}}