Figure 1

Modalities of ‘sensory speciation’. This figure represents the different premating isolation modalities involving a divergence of sensory recognition systems. In columns, the different behaviours that can be involved in premating isolation are indicated; in rows, the different types of sensory systems potentially implicated in these different behaviours are indicated. ‘Sensory isolation’ modalities can be classified either by the premating barrier involved (for example, behavioural, habitat, pollinator isolation) or by the type of sensory system involved (for example, visual, chemosensory, auditory isolation). Light grey box (A) shows previous reviews that focused on behavioural isolation. Dark grey box (B) shows the present review that focuses on chemosensory isolation.