Example : mosquito Diptera and moth Lepidoptera males. Each segment is angled or notched on one side, thus making these antennae to look like saws. These antennae are bristle-shaped, being thinner and longer in their ends. They are quite similar to filiform antennae, but thinner. Example : mayflies Ephemeroptera , dragonflies and damselflies Odonata.
Similar to filiform antennae, but the terminal segments are pointed and slender, looking like a style. The style can either have bristles or not. Example : brachycerous flies Diptera. You can read more about the different antennal models here and here , or take a look to the antennal gallery by John Flannery.
Main picture by Jean and Fred , CC 2. Given that living creatures detect their environments using different ways, it would be interesting from an information point of view to figure out the differences between human nose and insect antennae. Esteu comentant fent servir el compte WordPress. Esteu comentant fent servir el compte Google. Esteu comentant fent servir el compte Twitter. Esteu comentant fent servir el compte Facebook. Aquest lloc utilitza Akismet per reduir els comentaris brossa.
Apreneu com es processen les dades dels comentaris. Types of antennae in crustaceans. Picture obtained from Wikipedia link. How do insects feel through antennae? So, what does this title exactly mean? Picture above: antennae under electronic microscope. Picture below: detail of the sensilla. Both images taken from cronodon. Types of antennae in hexapods Except for the proturans, which are wingless hexapods, diplurans, springtails collembola and insects develop different types of antennae.
These are divided in two main groups: Segmented antennae : springtails and diplurans. Each segment has an own set of muscles that moves it independently from the rest of the antenna. Flagellate antennae : insects. This is a wrong name because they are not only used for touch. The antennae are actually the insects 'nose' - they are used for the sense of smell. The paired antennae are made up of a number of individual joints. This means they can be very mobile.
The basic form of antenna is filiform. In this type there are many segments that are more or less equal in size. Imagine being able to smell your dinner from the other side of a sports field. Insects do this with the pair of antennae on their heads. They can also use them to feel the surface of an object, sense hot and cold, listen to sounds or detect the movement of air or wind. Insect antennae contain special cells for detecting odours called olfactory sensilla.
This is similar to what happens inside our noses when we smell something, but insects can detect odours at much smaller concentrations than what we can. Because antennae are paired, insects are able to smell in stereo — they can use the tiny difference in odour concentration between each antenna to figure out the direction of the odour source. This is useful when developing ways to manage pests without using pesticides.
For example, some moths are pests because their larvae eat crops, but if scientists know which compound the male and female moths use to attract a mate a sex pheromone , they can put some of that compound into traps and lure the moths away from the crops. In order to understand which compounds may be attractive or repulsive to an insect, a procedure called coupled gas chromatography-electroantennographic detection GC-EAD is used.
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