Armillifera
| Armillifera Temporal range: about Ediacaran
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| Artists interpretation of Armillifera parva. | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Genus: | †Armillifera Fedonkin, 1980
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| Species: | †A. parva Fedonkin, 1980
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| Binomial name | |
| †Armillifera parva Fedonkin, 1980
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Armillifera parva is a species of Ediacaran proarticulate[1] 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.[2][3]
Morphology
[edit]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.[4]
Classification
[edit]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.[4] 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
[edit]References
[edit]- ^ "Fossilworks: Armillifera". fossilworks.org. Retrieved 17 December 2021.
- ^ Martin, M. W.; Grazhdankin, D. V.; Bowring, S. A.; Evans, D. A. D.; Fedonkin, M. A.; Kirschvink, J. L. (5 May 2000). "Age of Neoproterozoic Bilatarian Body and Trace Fossils, White Sea, Russia: Implications for Metazoan Evolution". Science. 288 (5467): 841–845. doi:10.1126/science.288.5467.841.
- ^ Fedonkin, M.A.; Simonetta, A; Ivantsov, A.Y. (2007), "New data on Kimberella, the Vendian mollusc-like organism (White sea region, Russia): palaeoecological and evolutionary implications", in Vickers-Rich, Patricia; Komarower, Patricia (eds.), The Rise and Fall of the Ediacaran Biota, Special publications, vol. 286, London: Geological Society, pp. 157–179, doi:10.1144/SP286.12, ISBN 978-1-86239-233-5, OCLC 156823511
- ^ a b Ivantsov, A. Yu (2010-12-01). "Paleontological evidence for the supposed precambrian occurrence of mollusks". Paleontological Journal. 44 (12): 1552–1559. doi:10.1134/S0031030110120105. ISSN 1555-6174.
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