Figure 8
Evolution of subaerial endolithic systems (soloids) and their contribution to the increased complexity of landscapes. Here we refer mainly to cryptoendolithic varieties. Lower estimate of time boundary (1.4 Ga) for fungi appearance in endolithic systems is proposed upon protein sequence data by Heckman et al.7; upper boundary of 0.4 Ga stands for various unambiguous fossil data on fungi and lichens in cherts.
