General entomology. Anatomy and physiology. Questions.

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Трофим, 18.11.2014 21:17

Please tell me the criterion by which you can distinguish between running and walking limbs (except for the length of the limb and the length of the leg members). With beetles, everything seems to be simple. Carnivores and herbivores, massive legs, thighs, etc. But I have difficulty with imago for the following species: hornet, dragonfly, water strider, aphid, earwig, mayfly, raevik bug. The fluent visual morphology of the limbs of these insects is quite consistent with the running type (relatively thin limbs). But I understand that aphids, mayflies and dragonflies do not run and they have walking limbs, I have not seen a hornet close (dumb), but I also understand that they are walking. A water skater ?negative ones. A mosquito ? walking routes. At the same time, the deer beetle, along the length of the segments of the legs, is slightly inferior in proportions to ground beetles, but as I understand it, it has walking legs.

If it is not difficult to consult on these types (imago):
1 Dragonfly-walking
2 Water Skaters - ?
running 3 Butterflies-walking
4 Beetle-deer-walking
5 Aphid-walking
6 Hornet -?walking
7 ant - ?begat
8 Earwig - ?hodilnye
9 Mayfly-hodilnye
10 Bedbug krajevik - hodilnye

P.S.
1) What criteria would you indicate to students, preferably in two or three sentences on the difference between walking and running limbs? Given the fact that many of them do not even know the Colorado potato beetle and do not have entomological intuition.
2) Any help is welcome. Even if you confirm the limb types of the 10 insects listed above.
3) If you are interested, you can view the summary lesson here https://vk.com/page-63137030_48645453

Comments

26.07.2015 13:48, Андреас

Damn it! "now I'm completely confused!
1) - EYES
dorsal eyes, simple eyes (ocelli), additional small (up to 0.03 mm in diameter) visual organs in insects-usually 3 on the frontal or parietal part of the head, between the faceted eyes, in arachnids from 1 to 5 pairs on the dorsal side of the prosoma. These lenses are constructed like a chamber eye-with a single corneal lens, under which a layer of photosensitivity is located. g. Insects are characterized by high light intensity, but the retina is defocused (which does not allow them to perceive the image of objects). They support the tone of the central nervous system in the dark, regulate photokinetic reactions, and serve to assess abs. light conditions and may affect the operation of faceted eyes.
"I already knew that.
2) - why do I read in some sources that "eyes are missing" (http://danaida.ru/sem1/molpestr.htm), and in the one you sent-naobrot - "Head with eyes"!
3) - I have never seen or noticed such" foreheads " in any butterfly at all; - So I should be ashamed.
- However, in your drawing-this is not a forehead, but an eye!!!