Teratology in entomology. Deformities of insects.

Most often, there are underdevelopments or disorders in the development of elytra - wrinkled, etc.
But this is more of a traumatic nature (damage at the pupal stage).

This post was edited by Bad Den - 02.10.2006 22: 33

And I once saw, if I'm not mistaken, a willow barbel in which one of the segments of the antennae seemed to be twisted-about 90 degrees , and without any signs of damage. Wings-I once saw another uchsacha, I don't remember which one, whose wings for some reason didn't fold and there were some "fringe" ones.

And I once saw, if I'm not mistaken, a willow barbel in which one of the segments of the antennae seemed to be twisted-about 90 degrees , and without any signs of damage. Wings-I once saw another uchsacha, I don't remember which one, whose wings for some reason didn't fold and there were some "fringe" ones.

Deformities of the antennae, legs and elytra are most often associated with problems in the pupal stage. In the picture just one of these handsome men. I caught Cetonia aurata with the front legs reduced to complete absence. The prothorax was deformed and reduced - the role of farts was performed by the middle limbs.  

Pictures:
meg.jpg — (121.76к) 03.10.2006 — 17.10.2006

last year, a friend caught a burdock with a color that looks more like an admiral (many parts are blackened), another friend caught a lot of geeks in his lifetime - for example, a yellow crocea with completely gray wings-without a border (more precisely, it seems to merge).
On the same occasion, I am interested in the question of the blackness of some females of meleager daphnis - what is their nature? And then it occurs often.
Another interesting case, though of a traumatic nature, is that one female corydon, which I caught this year in a fully developed lower wing, has a black round hole in ~20-30% of the wing.

Once when I was a child, I found a may beetle with two legs sitting on one shin. Unfortunately, I did not keep my find, which I now regret - since then I have not come across a single insect with a similar deformity.
Much later, I caught an ammophila that had 3 cubital cells on one wing, and on the other they were clearly (without a hint of dividing veins) fused into one. This instance I have somewhere lies, it seems

In parasitic eardrums of riders, not often, but there are specimens with signs of both sexes (gynandromorphs). For example, the antennae of a female, and the genitals of a male and vice versa. This, by the way, allows you to correlate males and females of this species.

This post was edited by Proctos - 03.10.2006 22: 20

But in perepons, this may be due to a feature of development-polyembryony. And if I'm not mistaken, Kirschenblatt describes such hermaphrodites among the higher perepons (bees) - and this is due to parasites that, sitting inside the insect, secrete substances that lead to such an outrage.

Last year, in the Ramenskoye district of the Moscow Region, in early August, I caught Araschnia levana with underdeveloped wings and a modified pattern - with orange elemetnas on top. Apparently, a mutant or an isolated case of the development of an incomplete third generation of A. l. f. porima, characteristic of the southern regions.

Hello everyone So the question is, is crooked cerci in earwigs a mutation or not?

Hello everyone So the question is, is crooked cerci in earwigs a mutation or not?

this is not a mutation, straight cerci in larvae, and adults carry normal curves and different ones. Different species have their own characteristics.

I just wanted to touch on this topic!
I have Morphocarabus wulffiusi, caught by R. Filimonov in the Far East. So, the front left shin has a small spiked process-a clear mutation. I'll post a picture later.

Hello everyone So the question is, is crooked cerci in earwigs a mutation or not?

Females are more or less straight, but males are curved. In general, of course, it depends on the type.
Here's an example.
Female
  
Male
  

Pictures:
d_female.JPG — (4.88 k) 05.10.2006-19.10.2006
d_male.JPG — (11.97к) 05.10.2006 — 19.10.2006

Well, why just mutation?! Not every terata is a consequence of genetic hereditary changes. However, probably here "mutation" is more slang than a scientific term.
As for deformities in insects, this is a fairly common phenomenon (especially if we take into account violations of wing venation, curvature-fusion of the elytra grooves, etc.). Fluctuating asymmetry is generally characteristic of all creatures. which God intended to be symmetrical.
I have several objects (beetles ch. arr.) in which the number of segments on the legs and their size varies quite widely (both in the direction of increasing and decreasing). A separate song is pigmentation disorders. There's really a lot to talk about...
And we also have a friend in town who collects (if you can call it that) lateral gynandromorphs (half of the body is male, the other half is female). So it is generally... my brain (at least mine) can't accept anything (until I saw it myself, I didn't believe it).
He's got an earwig of some sort, too, a gynadromorph.

This post was edited by scarabee - 05.10.2006 09: 28

Well, maybe not a mutation-experts know better...
Posting a photo of M. wulffiusi

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  Morphocarabus_wulffiusi_m.JPG — (408.45к) 06.10.2006 — 20.10.2006

At the conference in Belgorod (2-4 10 2006) there was an interesting report on the freaks of beetles and showed a lot of photos. If you are interested, I can give you the author's email address (via my personal account). I have one of the most striking freaks Phyllognathus excavatus from Turkmenistan with eight legs! He has one front leg at the level of the trochanter divided into three thighs and, accordingly, there are other parts of the leg of different development.

I thought maybe the branching of the legs is the result of some kind of prazite or other foreign bodies wedged into the imaginal disks and interrupted the contacts of cells inside it? about similar things, but Gilbert wrote about frogs.

The fool knows it - the development of higher insects is too determined... Rather, if some rubbish sticks in, the development simply won't go any further...

Dumaju etot ekzempljar budet interesen

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  prioninae_sp_small.jpg — (82.43к) 12.10.2006 — 26.10.2006

what's the fun here?

I agree, it seems like a normal prionus...

The fool knows it - the development of higher insects is too determined... Rather, if some rubbish sticks in, the development simply won't go any further...

Yes, and development in general and the imaginal disk seem to be quite deterministic... Although, looking at the development of the vulva in C. elegans, it may also seem that each cell does everything from now to now. But nevertheless, this is not quite true - if you make a distortion, it may turn out that it is also similar in insects. in any case, they have deformities (and not only ginandromofnogo plan)...
and what is the joke of the beetle, too, I do not understand ...

Poschitaite kolichestvo chlenikov usikov u etogo i lubogo drugogo vida iz Prionina i obratite vnimanie na ih formu.

I chto togda eto za vid, esli vi schitaete ego normalnim?

This post was edited by mikepride - 10/12/2006 16: 22

there really seem to be a lot of segments, but I do not know how many this species should have. And the antennae themselves are normal-a standard form for many prions, especially Asian ones. Some species have even cooler ones. I don't know the specific name
I counted 20

And at me 18 turns out, well and two more at sonovaniya-scapus and peditsil that whether are called? A total of 20. So did my namesake
Since the shape of both the right and left antennae are the same, this is most likely a mutation. Moreover, such mutations are easy to imagine.

This is a perfectly normal male barbel from the tribe Prionini (Prionus margelanicus Thery). In males, by the way, the number of segments of the antennae can vary within one species.

Compare with Microarthron komarowi and the rest on the tribes page - you can also find more than that

Where is there even a bug caught?

Zhuk is Osha, Kirgizia, P. margellanicus is etogo mesta tozhe est, oni normalnie, eto tozhe skoree vsego margellanicus, prosto "mutant" с udvoennim kolichestvom chlenikov.
Normalnim ja bi ego ne nazval, esli tolko eto ne sp. nov.
Komarovi tozhe est - no eto drugaja "pesnja".

Interesnaja informacia - est konkretnie publikacii? Est г kogo opisanie P. margellanicus gljanut?

Plavilshchikov has written in the volume" Fauna of the USSR " (you can download it here http://www.zin.ru/Animalia/Coleoptera/rus/plav_xxi.htm).
Why I'm not so sure that this is Prionus margelanicus, because it has 15-17 segments in the antennae of males. But according to the tables from the above volume of "Fauna", only it is more or less suitable. But perhaps this species is simply not included in the identifier, or (which is no less likely) - I simply did not consider the details of the structure in the photo.

This post was edited by Bad Den - 10/13/2006 15: 55

V tom to i delo Bad Den, chto vida s takimi priznakami dla fauni ex-USSR net...
Eto ja tochno znaju, t.k. konsultirovalsja v svoe vremja s Sergeem Murzinim и videl vsu izvestuju Prioninae.
No eto skoree vsego ne noviy vid, a prosto urod (mutant)...

Pictures:
  prion_big.jpg — (141.83к) 13.10.2006 — 27.10.2006

Have you tried contacting M. L. Danilevsky???

V tom to i delo Bad Den, chto vida s takimi priznakami dla fauni ex-USSR net...
Eto ja tochno znaju, t.k. konsultirovalsja v svoe vremja s Sergeem Murzinim и videl vsu izvestuju Prioninae.
No eto skoree vsego ne noviy vid, a prosto urod (mutant)...

Well, the fact that your specimen does not fit any of the species listed in Plavilshchikov does not mean that it is a mutant, it is quite possible that this is the first find of a species not specified from the territory of the former USSR, or a new species.
Indeed, show it to M. L. Danilevsky or A. L. Lobanov, if possible.

Well, why immediately a new species - if in this family the number of segments in the antennae is unstable,then there may well be a mutant.

V tom to i delo Bad Den, chto vida s takimi priznakami dla fauni ex-USSR net...
Eto ja tochno znaju, t.k. konsultirovalsja v svoe vremja s Sergeem Murzinim и videl vsu izvestuju Prioninae.
No eto skoree vsego ne noviy vid, a prosto urod (mutant)...

Colleague, are you sure that the label is correct? However, it is doubtful that this is Kyrgyzstan. After all, all Asian beetles with such antennae have rather sharp tops of the segments of their legs. Margelanicus also has a different pronotum. Your bug generally looks more like American prions like imbricornis.
Do you have one copy?

This year I caught Nepa cineria in the Moscow region, where the right front leg is normal, but the left shin is about a third longer and ends not with a "paw", but with a smooth thickening like a stump.
Running away mutant still on the road, there was no stain in the cigarette pack stuffed, probably not tightly closed.

Privet !

Well, the fact that your specimen does not fit any of the species listed in Plavilshchikov does not mean that it is a mutant, it is quite possible that this is the first find of a species not specified from the territory of the former USSR, or a new species.
Indeed, show it to M. L. Danilevsky or A. L. Lobanov, if possible.

Ja predpochital obshatsja po takim voprosam s Murzinim, na moi vzglad on ne menshe razbiraetsja v Cerambycidae chen Lobanov i navernoi i Danilevsky...
Ne dumaju cjto eto noviy vid, mesto uzh bolno oblovlennoe...

Privet!

Colleague, are you sure that the label is correct? However, it is doubtful that this is Kyrgyzstan. After all, all Asian beetles with such antennae have rather sharp tops of the segments of their legs. Margelanicus also has a different pronotum. Your bug generally looks more like American prions like imbricornis.
Do you have one copy?

Zhuk bil poiman A. Sochivko, poetomu nevernost etiketki iskluchena.
K sozhaleniu dr foto seichas net, no vot esche iz moei kollekcii.
Iz etogo mesta takoi ekzempljar odin, vse ostalnie samie obiknovennie.

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  prioninae_part.JPG — (63.89к) 16.10.2006 — 30.10.2006

Privet !
Ja predpochital obshatsja po takim voprosam s Murzinim, na moi vzglad on ne menshe razbiraetsja v Cerambycidae chen Lobanov i navernoi i Danilevsky...
Ne dumaju cjto eto noviy vid, mesto uzh bolno oblovlennoe...

One head, as they say, is good, but two is better. It never hurts to show a copy to several specialists in case of doubt. In the end, you can prepare the genitals of typical representatives of P. margellanicus and this specimen and compare - either everything becomes clear, or it gets completely confused

One head, as they say, is good, but two is better. It never hurts to show a copy to several specialists in case of doubt. In the end, you can dissect the genitals of a typical P. margellanicus specimen and compare them - either everything becomes clear or completely confused

yes, genitals can help. If it's really bad , you can also look at endophallus. And the result is almost certainly imbricornis

Hi!

And the end result is almost certainly imbricornis

Does Kyrgyzstan import timber from Central and South America? Or did you fly out of the household of a local merchant?

Something doesn't add up...

is it normal for a bindweed hawkmoth to have such a skull?
I think it's a much more realistic skull than a dead head huh?

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PICT01081.jpg — (17.46 k)