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Orbisiana

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Orbisiana
Temporal range: Ediacaran
Scientific classification Edit this classification
Kingdom: Incertae sedis
Genus: †Orbisiana
Sokolov, 1976
Species
  • O. simplex Sokolov, 1976
  • O. linearis (Chen, 1994)

Orbisiana is an Ediacaran benthic organism formed out of series of agglutinated spherical or hemispherical chambers. It is believed to be a close relative of Palaeopascichnus.


Description

Orbisiana occur in aggregates made up of rows arranged in sometimes branching chains. 3-D analysis has shown Orbisiana to be cylindrical in shape and open at both the top and bottom ends of its structure. The chains often varied in shape from straight to curved and disorganized lines of spheres with no fixed number of spheres per chain. Specimens range in size but generally have diameters of 0.2–0.9 millimetres (0.0079–0.0354 in). The cell membranes of the organism are often pyritized. The individual chambers are agglutinating.

Diversity

Two species have been documented, O. linearis and O. simplex.

It fits into the Palaeopascichnids, the other genus being Palaeopascichnus itself.

Distribution

Over 100 specimens have been collected from the lower Ediacaran Lantian Formation located in Xiuning and Yixian counties of the Anhui Province, China.

Discovery

Orbisiana was first described by B.S. Sokolov in 1976, found in the Neoproterozoic of Russia.

Ecology

Orbisiana likely favored calm and well aerated shallow marine habitats in which it could utilize sunlight for benthic photosynthesis.

See also

References

  1. Kolesnikov, Anton V.; Liu, Alexander G.; Danelian, Taniel; Grazhdankin, Dmitriy V. (2018). "A reassessment of the problematic Ediacaran genus Orbisiana Sokolov 1976". Precambrian Research. 316: 197–205. Bibcode:2018PreR..316..197K. doi:10.1016/j.precamres.2018.08.011. S2CID 134213721.
  2. ^ Wan, Bin; Xiao, Shuhai; Yuan, Xunlai; Chen, Zhe; Pang, Ke; Tang, Qing; Guan, Chengguo; Maisano, Jessica A. (2014). "Orbisiana linearis from the early Ediacaran Lantian Formation of South China and its taphonomic and ecological implications". Precambrian Research. 255: 266–275. Bibcode:2014PreR..255..266W. doi:10.1016/j.precamres.2014.09.028.
  3. ^ Jensen, Sören (2003). "The Proterozoic and Earliest Cambrian Trace Fossil Record; Patterns, Problems and Perspectives". Integrative and Comparative Biology. 43 (1): 219–228. doi:10.1093/icb/43.1.219. ISSN 1540-7063. PMID 21680425.
  4. ^ Sokolov, B. S. (1976). "The Earth's organic world on the path toward Phanerozoic differentiation". Vestn. Akademiya Nauk. 1: 126–143.
  5. Kolesnikov, Anton V; Liu, Alexander G; Danelian, Taniel; Grazhdankin, Dmitriy V (2018). "A reassessment of the problematic Ediacaran genus Orbisiana Sokolov 1976". Precambrian Research. 316: 197–205. Bibcode:2018PreR..316..197K. doi:10.1016/j.precamres.2018.08.011. S2CID 134213721.
  6. ^ 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". Geological Society, London, Special Publications. 286 (1): 157–179. Bibcode:2007GSLSP.286..157F. doi:10.1144/sp286.12. S2CID 331187.
  7. ^ Xiao, Shuhai; Dong, Lin (2006). Neoproterozoic Geobiology and Paleobiology. Topics in Geobiology. Springer, Dordrecht. pp. 57–90. doi:10.1007/1-4020-5202-2_3. ISBN 9781402052019.
  8. Kolesnikov, Anton V.; Liu, Alexander G.; Danelian, Taniel; Grazhdankin, Dmitriy V. (2018). "A reassessment of the problematic Ediacaran genus Orbisiana Sokolov 1976". Precambrian Research. 316: 197–205. Bibcode:2018PreR..316..197K. doi:10.1016/j.precamres.2018.08.011. S2CID 134213721.
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