Figure 1 from: Dunlop J, Penney D (2012) Summary statistics for fossil spider species taxonomy. ZooKeys 192: 1-13. https://doi.org/10.3897/zookeys.192.3093

Figure 1 - The evolutionary tree of spiders (updated from Penney and Selden 2011: data table 4) showing known ranges of spider families based on described fossils and predicted ranges of sister taxa based on their phylogenetic relationships (strictly fossil families inserted in approximate positions as per hypothesized relationships proposed in the literature, but not based on any cladistic analysis). Note that this is a highly dynamic figure, with known ranges and predicted ranges changing frequently as a result of new fossil discoveries, changes in phylogenetic hypotheses, revised dating of various deposits and even potentially through revised dating of geological periods and epochs. Researchers should check Dunlop et al. (currently 2012 and updated every six months) for the most recent data on the oldest fossils of each family and genus.