Identification of dragonflies (Odonata)

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25.10.2010 21:53, Kharkovbut

There is too much black on the back of the head, the striolatum has more brown, I think. And the caudal segments of the abdomen from above - on the contrary, are too light (although this varies). Well, the probability, yes.

I examined herds of striolatums and vulgatums from the Kharkiv region... To be honest, there are no qualitative differences in the color of the back of the head. Tail segments-yes, on average, the vulgatum is lighter, but only on average. (IMHO, in addition to the genitals, there are two fairly stable signs: the forehead and chest from the side, although there are deviations here.)

So for a combination of reasons, the picture is, of course, vulgatum, but just in case I'll leave a question mark.

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27.10.2010 0:13, Kharkovbut

On the side of the chest:

at the meridian, dark stripes along the seams are hardly noticeable, the chest looks monotonous;

in the vulgatum and striolatum, the stripes along the sutures are clearly visible;

in the vulgatum, the breast is monotonous (with the exception of prominent sutures), and in the striolatum it is characteristically bicolored - the extreme lobes are greenish-yellowish, the middle one is reddish.

These signs work best for adult males, almost 100% of the time. For females, it works worse: there are (adult) females of striolatum, in which the bicolor of the breast is almost invisible. For young females of striolatum / vulgatum, this sign is not applicable at all. (I.e., I will not dare to determine the females for sure if the genital plate is not visible.

)

The meridionale differs quite well from the striolatum / vulgatum in that it is generally much lighter (both males and females), in males the abdomen has almost no dark markings (in the striolatum/vulgatum they are always clearly visible); the legs of the meridionale are also much lighter. Adult males of the meridional range are uniformly red, including the forehead and lower part of the eyes; this is rare in vulgatum and almost never in striolatum.

Another funny thing is that it is the meridionale that is very susceptible to parasitic ticks - there are on every 3rd-4th specimen; on the vulgatum they were observed once in several years of observation; on the striolatum they were never caught.

I enclose photos of typical adult specimens.

Pictures:
picture: Sympetrum.jpg

Sympetrum.jpg — (165.75к)

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04.06.2011 21:35, Kharkovbut

P.S. And you know, I remembered that there was even a small discussion about it here: http://molbiol.ru/forums/index.php?showtopic=170973&st=300 With your participation

Funny, I'd already forgotten.

My opinion a year ago is absurd, since then I seem to have grown a lot as an odonatologist.

Elena's opinion is very authoritative; indeed, the shape of the pronotum in profile does not seem to be the same as when viewed from above, which, unfortunately, is not very sharp. But the pattern on the 8th segment, IMHO, is typical for pulchellum, at least in the Kharkiv region as one of the color options (this species is very variable). In general, as a result, I do not dare to identify this dragonfly from the available images.

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