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
Domain:	Bacteria
Kingdom:	Bacillati
Phylum:	Cyanobacteriota
Class:	Cyanophyceae
Order:	Nostocales
Family:	Rivulariaceae
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]