Structure of insects

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Коллекционер, 04.11.2011 13:53

Recently removed from Hyles euphorbiae all the "scaly" cover, as a result of the brow found on the front edge of the rear wing, at the base of the spike or claw, I do not know how to correctly.. so-
its length is ~2 mm, mobile(like the dorsal fin of a fish), slightly bent,

I have a question
For what this spike is needed?

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04.11.2011 17:05, vasiliy-feoktistov

Recently removed from Hyles euphorbiae all the "scaly" cover, as a result of the brow found on the front edge of the rear wing, at the base of the spike or claw, I do not know how to correctly.. so-
its length is ~2 mm, mobile(like the dorsal fin of a fish), slightly bent,

I have a question
For what this spike is needed?

The most clear structural difference between nocturnal and diurnal butterflies is related to the mechanisms of coupling of the front and rear wings, i.e. synchronization of their movement in flight. These mechanisms are two in moths. One of them is called uzdechkov. The frenulum is an awl-shaped outgrowth extending from the underside of the front edge of the hind wing at its base. It is inserted into the so-called retinaculum on the forewing, which in males usually resembles a pocket and is located below the anterior edge of the wing on the costal vein, and in females it looks like a bunch of bristles or stiff hairs at the base of the medial vein. The second mechanism is provided by a narrow blade clinging to the rear wing on the inner edge of the front wing at its base. Such a structure, called yugum, is known only in a very few of the most primitive forms. In diurnal butterflies, the clutch is caused by an outgrowth on the hind wings, which does not correspond to the bridle. However, there are a few exceptions. One primitive diurnal butterfly retains its bridle, and some moths have their wings interlocked like diurnal butterflies.[quote]
Read it.
And why was this topic made?

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