The sensory system of fruit flies detects CO2 via specialized taste neurons.
"Here we identify a novel taste modality in this insect: the taste of carbonated water. We use a combination of anatomical, calcium imaging and behavioural approaches to identify a population of taste neurons that detects CO2." (Fischler 2007:1054)
Learn more about this functional adaptation.
- Fischler, Walter; Kong, Priscilla; Marella, Sunanda; Scott, Kristin. 2007. The detection of carbonation by the Drosophila gustatory system. Nature. 448(7157): 1054-1057.