Greening of the Earth pushed way back in time
New work by Gregory Retallack about terrestrial fossils greater than 2 million years old. The identity of the organisms is unknown, but are compared to Geosiphon. Geosiphon is fascinating in that it is a non-lichen fungal-cyanobacterial symbiosis. The cyanobacteria are Nostoc, and they live ndosymbiotically -- inside the fungal cells. The fungi are interesting as well since they are not ascomycetes like almost all lichens (there are a few basidomycete lichens too). Rather they are a lineage of fungi close to the glomeromycota which form arbuscular mycorrhizas.
See my older post about a different controversial paper by Retallack.
A networking resource devoted to biological soil crusts and the researchers who study them. We will provide a means for international scientists to communicate, share their research, share important news and announcements, ask questions and find collaborators. We will also provide a space for informal writing on research, opinion, and ideas (now seeking posters!).