Parent taxon: Garwoodiaceae according to D. Vachard and M. Aretz 2004
See also Dragastan et al. 1999 and Senowbari-Daryan et al. 1993
Sister taxa: Baccanella, Bacinella, Clinortonella, Garwoodia, Nostocites, Ortonella, Ortonellopsis
Subtaxa: Hedstroemia halimedoides
Type: Hedstroemia halimedoides
Ecology: stationary "photoautotroph"
Distribution:
• Triassic of Austria (1 collection), Italy (2), Japan (1), Oman (1)
• Permian of United States (1: New Mexico)
• Givetian of China (1)
• Devonian of China (1), the Russian Federation (1)
• Silurian of Canada (2: Nunavut, Ontario), Sweden (2), United States (2: Alaska)
• Whiterockian of Canada (1: Newfoundland and Labrador)
• Ordovician of Canada (1: Newfoundland and Labrador), China (3), Norway (1), the Russian Federation (2), United States (1: Tennessee)
• Cambrian of Canada (1: Northwest Territories), the Russian Federation (1)
Total: 26 collections including 27 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.