Hedstroemia

For the trilobite genus, see Hedstroemia (trilobite).

The extinct genus Hedstroemia was once thought to be a rivulariacean cyanobacterium.^{[needs update?]} It forms oval blobs composed of sinuous tubes that have rounded outlines and occurs in conjunction with Solenopora.^[3]

Hedstroemia Temporal range: Llandovery–Upper Devonian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Clade:	Viridiplantae
Division:	Chlorophyta
Class:	UTC clade
Order:	Bryopsidales
Family:	Codiaceae
Genus:	†Hedstroemia A. Rothpletz, 1913
Type species
†Hedstroemia halimedoidea A. Rothpletz, 1913
Species[2]
†Hedstroemia bifilosa A. Rothpletz, 1913 †Hedstroemia halimedoidea A. Rothpletz, 1913

Hedstroemia was formerly assigned to the now obsolete taxon porostromata.^[4] In 2020, the genus was assigned to the cyanobacteria order Nostocales.^[5]

References

1. "Fossilworks: Hedstroemia". paleodb.org. Retrieved 7 April 2018.
2. Liu, Lijing; Wu, Yasheng; Yang, Haijun; Riding, Robert (2016). "Ordovician calcified cyanobacteria and associated microfossils from the Tarim Basin, Northwest China: systematics and significance" (PDF). Journal of Systematic Palaeontology. 14 (3): 183–210. doi:10.1080/14772019.2015.1030128. S2CID 129684955.
3. Riding, R.; Watts, N. (1981). "Silurian algal reef crest in Gotland". Naturwissenschaften. 68 (2): 91. Bibcode:1981NW.....68...91R. doi:10.1007/BF01047229. S2CID 8834679.
4. Monty, C. L. (1981). "Spongiostromate vs. Porostromate Stromatolites and Oncolites". In Monty, Claude (ed.). Phanerozoic Stromatolites. Berlin, Heidelberg: Springer. pp. 1–4. doi:10.1007/978-3-642-67913-1_1. ISBN 978-3-642-67913-1.
5. Lijing Liu; Yasheng Wu; Hongping Bao; Hongxia Jiang; Lijing Zheng; Yanlong Chen (2020). "Diversity and systematics of Middle-Late Ordovician calcified cyanobacteria and associated microfossils from Ordos Basin, North China". Journal of Paleontology. 95: 1–23. doi:10.1017/jpa.2020.82. S2CID 226349226.

• Guiry, M.D.; Guiry, G.M. (2008). "Hedstroemia". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2009-06-24.