Armillifera

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Armillifera Temporal range: 635–541 Ma PreꞒ Ꞓ O S D C P T J K Pg N Ediacaran
A reconstruction of Armillifera parva.
Scientific classification
Kingdom:	Animalia
Phylum:	†Proarticulata
Genus:	†Armillifera Fedonkin, 1980
Species:	†A. parva Fedonkin, 1980
Binomial name
†Armillifera parva Fedonkin, 1980

Armillifera parva is an Ediacaran marine animal, that existed on Earth about 555 million years ago.^[1] It was first described by the author Mikhail Fedonkin in 1980. Its fossils were discovered in the White Sea area, Arkhangelsk Region, Russia. The fossils of A. Parva were restricted to almost the same stratigraphic range as Kimberella, but they were rarely found.

Morphology[]

Armillifera is bilaterally symmetric, oval shaped animal from the Ediacaran period. It's convex in the center with a flattened surrounding band, and its surface is covered by numerous tubercles fused on the band to form rounded ridges. The surface of its central region possesses deep, hook-shaped depressions, that are arranged accordingly to glide reflection symmetry.^[2]

Classification[]

The 'shell' of Armilliferahas a lack of grow line, and the bilateral symmetry that Armillifera has suggested that it was likely to be an actively moving organisms in its environment.^[2]

The fact that the deep hook-shaped depressions in its central region are arranged accordingly to glide reflection symmetry, may refer its connection to Proarticulate, an extinct Ediacaran phylum that showed the same trace. But the resemblance of the shell may not be the ultimate evidence to support that, so it's still unclear which phylum Armillifera belonged to.

See also[]

• List of Ediacaran Genera

References[]