Ivesheadiomorphs

File:Pseudovendia charnwoodensis.jpg

The "ivesheadiomorphs" are a group of fossilised structures known from Ediacaran localities in England and Newfoundland. They are considered to be taphomorphs, representing the poorly preserved biological remains of various contemporary taxa such as Charnia, Charniodiscus, Bradgatia, Primocandelabrum, Pectinifrons and others, that were effaced by partial decay by micro-organisms following death on the seafloor before burial by sediment.{{Cite journal | last1 = Liu | first1 = A. G. | last2 = McIlroy | first2 = D. | last3 = Antcliffe | first3 = J. B. | last4 = Brasier | first4 = M. D. | title = Effaced preservation in the Ediacara biota and its implications for the early macrofossil record | doi = 10.1111/j.1475-4983.2010.01024.x | journal = Palaeontology | issue = 3| volume = 54| pages = 607–630| year = 2010| url = https://www.academia.edu/402997| doi-access = free }}

Ivesheadiomorph structures were previously described as distinct organisms, namely Ivesheadia lobata ("pizza disk"), Blackbrookia oaksi, Shepshedia palmata{{Cite journal | author = H. E. Boynton, T. D. Ford| title = Ediacaran Fossils from the Precambrian (Charnian Supergroup) of Charnwood Forest, Leicestershire, England | journal = Mercian Geologist | volume = 13 | issue = 4 | pages = 165–182 | year = 1995}} and Pseudovendia charnwoodensis.{{Cite journal | author = H. E. Boynton, T. D. Ford| title = Pseudovendia charnwoodensis — A new Precambrian arthropod from Charnwood Forest, Leicestershire | journal = Mercian Geologist | volume = 7 | pages = 175–177 | year = 1979}} However, all of these fossils have since been rejected as valid taxa.