Insect specific olfactory receptors are not an adaptation to a terrestrial insect lifestyle, but evolved later in insect evolution.

Olfactory neurons of insects, once thought to express only a single type of olfactory receptor, exhibit widespread co-expression of receptors from multiple chemosensory gene families.

A moth can detect plant volatiles using an odorant receptor expressing in its ovipositor, and this odorant receptor has a much higher expression level in the ovipositor than antennae.

Differing from its ortholog in Helicoverpa armigera, pheromone receptor HassOr14b is tuned to the major sex pheromone component in H. assulta, and two amino acids in the intracellular domain determine their ligand selectivity.

A model of efficient coding by olfactory neurons explains context-dependence observed in the effect of perturbations to the olfactory environment.

A morphological characterization of Drosophila olfactory receptor neurons—conducted systematically at nanoscale resolution—yields an extensive morphometric dataset, identifies novel features of olfactory sensilla, and raises intriguing questions for how the size and shape of sensory neurons influence their function.

The southern house mosquito senses the oviposition attractants skatole and indole with two receptor proteins sharing only 50% amino acid identity, and having the residues alanine-73 and leucine-74 in the skatole and indole receptors, respectively, control their specificity.

In multi-channel sensory systems, gain adaptation can help maintain not only coding capacity across changes in signal intensity, but also combinatorial representations of odor identity.

The odor-elicited responses of olfactory receptor neurons consist of a discrete set of four spike pattern motifs, each with distinct adaptation properties, together amplifying distinctions between similar and temporally complex chemical inputs such as odor plumes.