''Armillifera parva'' is a species of

Ediacaran The Ediacaran ( ) is a geological period of the Neoproterozoic geologic era, Era that spans 96 million years from the end of the Cryogenian Period at 635 Million years ago, Mya to the beginning of the Cambrian Period at 538.8 Mya. It is the last ...

proarticulate first described by

Mikhail Fedonkin Academician Mikhail Aleksandrovich Fedonkin (; born June 19, 1946) is a Russian paleontologist specializing in documentation of the earliest animals' body fossils, tracks, and trails. He has also described numerous Vendian-aged fossils includin ...

in 1980. Its fossils were discovered in the

White Sea The White Sea (; Karelian language, Karelian and ; ) is a southern inlet of the Barents Sea located on the northwest coast of Russia. It is surrounded by Karelia to the west, the Kola Peninsula to the north, and the Kanin Peninsula to the nort ...

area, Arkhangelsk Region, Russia. These fossils of ''A. parva'' were restricted to almost the same stratigraphic range as ''

Kimberella ''Kimberella'' is an extinct genus of marine bilaterian known only from rocks of the Ediacaran period. The slug-like organism fed by scratching the microbial surface on which it dwelt in a manner similar to the gastropods, although its affinity ...

'', although fossils of both organisms have been rarely found.

Morphology

''Armillifera'' is bilaterally symmetric, oval shaped animal from the Ediacaran period. It's 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.

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. 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 Proarticulata is a proposed phylum of extinct, near-bilaterally symmetrical animals known from fossils found in the Ediacaran (Vendian) marine deposits, and dates to approximately . The name comes from the Greek () = "before" and Articulata, i. ...

References

Ediacaran life Aquatic animals Enigmatic prehistoric animal genera Ediacaran Proarticulata Fossil taxa described in 1980 {{Ediacaran-stub

Morphology

Classification

See also

References