Maximum likelihood character trait optimization of habitat preferences. Ancestral character states that are significantly supported are highlighted using either an orange label (for “arid/semi-arid” habitat preferences) or a green label (for “other” habitat preferences). Grey labels indicate ancestral characters for which the difference in log-likelihood is lower than 2.0. For each genus, information on systematics is provided using abbreviated subfamilial and tribal names. A picture of a typical xerophilic species (Onymacris rugatipennis) is also included.