Extinct genus of algae
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 was formerly assigned to the now obsolete taxon porostromata .[ 4] In 2020, the genus was assigned to the cyanobacteria order Nostocales .[ 5]
^ "Fossilworks: Hedstroemia" . paleodb.org . Retrieved 7 April 2018 .
^ 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 .
^ 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 .
^ 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 .
^ 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 .