| The ancestral pattern has a prominent anteroventral and distal coxal sensillum. |
| In many cases, when an attractant pheromone has two major components, the recipient has large numbers of cells specific to each of the compounds, often in the same sensillum. |
| From the central end of each A cell, an axon passes within the sensillum to the skeletal support and then in the tympanic nerve to the thoracic ganglia of the moth. |
| That expansion tweaks a tiny piezoelectric crystal in a way similar to a sphere of cuticula tweaking a sensillum. |
| In some animals the sensillum and accessory cells form a physical structure around the receptor cells. |
| This sensillum has two acoustic sensory receptors, called A cells. |
