{{Short description|Extinct species of marine animal}} {{italic title}} {{Distinguish|Armillifer}} {{Taxobox | fossil_range = late Ediacaran<br> ~{{fossil range|553}} | image = Armillifera parva.jpg | image_caption = Artists interpretation of ''Armillifera parva''. | regnum = Animalia | phylum = †Proarticulata | genus = †'''''Armillifera''''' | genus_authority = Fedonkin, 1980 | species = †'''''A. parva''''' | binomial = †'''''Armillifera parva''''' | binomial_authority = Fedonkin, 1980 }}
'''''Armillifera parva''''' is a species of Ediacaran proarticulate<ref>{{Cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=152327|title=Fossilworks: Armillifera|website=fossilworks.org|access-date=17 December 2021}}</ref> first described by Mikhail Fedonkin in 1980. Its fossils were discovered in the White Sea area, Arkhangelsk Region, Russia. These fossils of ''A. parva'' were restricted to almost the same stratigraphic range as ''Kimberella'', although fossils of both organisms have been rarely found.<ref>{{cite journal |last1=Martin |first1=M. W. |last2=Grazhdankin |first2=D. V. |last3=Bowring |first3=S. A. |last4=Evans |first4=D. A. D. |last5=Fedonkin |first5=M. A. |last6=Kirschvink |first6=J. L. |title=Age of Neoproterozoic Bilatarian Body and Trace Fossils, White Sea, Russia: Implications for Metazoan Evolution |journal=Science |date=5 May 2000 |volume=288 |issue=5467 |pages=841–845 |doi=10.1126/science.288.5467.841|pmid=10797002 |bibcode=2000Sci...288..841M }}</ref><ref name=Fedonkin2007>{{The Rise and Fall of the Ediacaran Biota|chapter=New data on ''Kimberella'', the Vendian mollusc-like organism (White sea region, Russia): palaeoecological and evolutionary implications|author=Fedonkin, M.A. |author2=Simonetta, A |author3=Ivantsov, A.Y. |pages=157–179 |doi=10.1144/SP286.12}}</ref>
== Morphology == ''Armillifera'' is bilaterally symmetric, oval shaped animal from the Ediacaran period. It is convex, located in the centre of its body, possess a flattened and surrounding band with its surface being covered by multiple turbercules that form rounded edges around the band. The surface of its central region possesses deep, hook-shaped depressions that are arranged accordingly to glide reflection of bilateral symmetry.<ref name=":0">{{Cite journal|last=Ivantsov|first=A. Yu|date=2010-12-01|title=Paleontological evidence for the supposed precambrian occurrence of mollusks|journal=Paleontological Journal|language=en|volume=44|issue=12|pages=1552–1559|doi=10.1134/S0031030110120105|bibcode=2010PalJ...44.1552I |issn=1555-6174}}</ref>
== Classification == The 'shell' of ''Armillifera'' possess a lack of a grow line, its bilateral symmetry suggests that ''A. parva'' might've been one of the more actively moving organisms.<ref name=":0" /> The fact that the deep hook-shaped depressions in its central region are arranged accordingly to glide reflection symmetry suggest a possible affinity with the Proarticulata.
== See also ==
== References == {{Reflist}}
{{Taxonbar|from=Q60761070}}
Category:Ediacaran life Category:Aquatic animals Category:Enigmatic prehistoric animal genera Category:Ediacaran Category:Proarticulata Category:Fossil taxa described in 1980 Category:White Sea fossils Category:Monotypic proarticulatan genera
{{Ediacaran-stub}}