Rangea

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Rangea
Temporal range: Ediacaran
~558–549 Ma[1]
Scientific classification edit
Kingdom: incertae sedis
Clade: Rangeomorpha
Genus: Rangea
Gurich 1929
Type species
R. schneiderhoehoni
Gurich 1929

Rangea is a frond-like Ediacaran fossil with six-fold radial symmetry.[2][3] It is the type genus of the rangeomorphs.

A total of six species have been described, but only the type species Rangea schneiderhoehoni is considered valid:

  • R. brevior Gürich 1933 = R. schneiderhoehoni.
  • R. arborea Glaessner et Wade, 1966 = Charniodiscus arboreus.
  • R. grandis Glaessner et Wade, 1966 = Glassnerina grandis = Charnia massoni.
  • R. longa Glaessner et Wade, 1966 = Charniodiscus longus.
  • R. sibirica Sokolov, 1972 = Charnia sibirica = Charnia massoni.

Rangea schneiderhoehoni fossils have been found in the Kanies and Kliphoek Members of the Dabis Formation and in the Niederhagen Member of the Nudaus Formation, Namibia. These deposits date from around 548 Mya. Rangea fossils have also been reported from the Ediacaran deposits of the Arkhangelsk region, Russia and in Australia. These fossils date from around 558-555 Mya.[2][3][4]

Rangea seems to have led a sessile existence upon the seabed.[2]

See also[edit]

References[edit]

  1. ^ Chen, Zhe; Zhou, Chuanming; Xiao, Shuhai; Wang, Wei; Guan, Chengguo; Hua, Hong; Yuan, Xunlai (2014). "New Ediacara fossils preserved in marine limestone and their ecological implications". Scientific Reports. 4: 4180. doi:10.1038/srep04180. PMC 3933909. PMID 24566959.
  2. ^ a b c Vickers-Rich, P.; Ivantsov, A. Y.; Trusler, P. W.; Narbonne, G. M.; Hall, M.; Wilson, S. A.; Greentree, C.; Fedonkin, M. A.; Elliott, D. A.; Hoffmann, K. H.; Schneider, G. I. C. (2013). "ReconstructingRangea: New Discoveries from the Ediacaran of Southern Namibia". Journal of Paleontology. 87: 1. doi:10.1666/12-074R.1.
  3. ^ a b Ivantsov, A. Yu.; Leonov M. V. (2009). The imprints of Vendian animals - unique paleontological objects of the Arkhangelsk region (in Russian). Arkhangelsk. p. 91. ISBN 978-5-903625-04-8.
  4. ^ Dzik, J. (2002). "Possible ctenophoran affinities of the precambrian "sea-pen" Rangea". Journal of Morphology. 252 (3): 315–334. doi:10.1002/jmor.1108. PMID 11948678.

Further reading[edit]

  • Glaessner, Martin F.; Wade, Mary 1966: The late Precambrian fossils from Ediacara, South Australia. Palaeontology 9 (4), pp. 599–628.
  • Gürich, Georg 1930: Uber den Kuibisquarzit in Sudwestafrika, Zeitschrift der Deutschen Geologischen Gesellschaft v.82: p. 637.