Grypania spiralis (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Grypania spiralis" in Spanish language version.

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geoscienceworld.org

Sharma, M., & Shukla, Y. (2009). Formation, Semri Group, Bihar, India. Current Science, 96(12), 1636.
Xiao, S. (2013). Written in stone: the fossil record of early eukaryotes. In Evolution from the Galapagos (pp. 107-124). Springer New York.
Wang, Y., Wang, Y., & Du, W. (2016). The long-ranging macroalga Grypania spiralis from the Ediacaran Doushantuo Formation, Guizhou, South China. Alcheringa: An Australasian Journal of Palaeontology, 1-10.

Han, T. M. & Runnegar, B. 1992. Megascopic eukaryotic algae from the 2.1-billion-year-old negaunee iron-formation, Michigan. Science, 257(5067): 232-235. (Abstract)

Butterfield, N. J. (2015). Early evolution of the Eukaryota. Palaeontology, 58(1), 5-17.