Journal Club 5th April: Global patterns of insect diversification: towards a reconciliation of fossil and molecular evidence?
Previous macroevolutionary studies of insects have often revealed multiple inferred diversification rate shifts, where responses to major past environmental changes, such as the Cretaceous Terrestrial Revolution, or the development of major key innovations, such as wings or complete metamorphosis are usually invoked as potential evolutionary triggers. However, an new study by Condamine et al. (2015) in Scientific Reports now suggest that neither the development of flight or complete metamorphosis, nor the Cretaceous Terrestrial Revolution environmental changes, induced immediate changes in diversification regimes. Instead clade-specific innovations likely promoted the diversification of major insect orders.
The impressive insect phylogeny analysed by Condamine et al. (2015).