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Clippings on the mandibles - why?

Community and Forum → Insects biology and faunistics → Clippings on the mandibles - why?

Aleksey Adamov, 27.05.2006 16:00

Who knows what function the clippings on the outer edge of the mandibles serve?
In particular, ground beetles of the genus Acinopus and Badister. Acinopus has tenderloins (1 pc.) on the right, and Badisters have tenderloins on the right and on the left (two different subgenera).

I asked our entomologists (RSU, Rostov-on-Don) a question, no one knows. It is assumed that the clipping does not have a function, but is simply linked to something necessary. But this, in my opinion, is a misconception.

This post was edited by Adamov - 27.05.2006 16: 01

Comments

27.05.2006 16:54, Proctos

Can I put a photo or drawing of such mandibles?

27.05.2006 17:28, Aleksey Adamov

Can I put a photo or drawing of such mandibles?

 the image is no longer on the site: Acinopus.JPG 
It's always on the right mandible (never on the left)

In Badister, one subgenus is only on the right, and the other subgenus is only on the left.

Pictures:
Acinopus.JPG — (111.22к) 27.05.2006 — 10.06.2006

27.05.2006 21:44, Aleksey Adamov

Yes, this question is apparently not a simple one.
Maybe it will be clearer if you get information about the biology and ecology of the species of these genera?
Do you have such information?

27.05.2006 22:14, Proctos

Yes, this question is apparently not a simple one.
Maybe it will be clearer if you get information about the biology and ecology of the species of these genera?
Do you have such information?

Perhaps you need to delve deeper into the question and look first at the fundamental works for example
Sharova I. H. 1981. Zhiznennye formy zhuzhelits (Coleoptera, Carabidae) [Life forms of ground beetles (Coleoptera, Carabidae)]. Nauka, pp. 1 - 283.

http://www.zin.ru/animalia/Coleoptera/rus/sharova.htm

29.05.2006 0:09, RippeR

delete this post and write a research paper before someone else doessmile.gif)

29.05.2006 19:24, Chromocenter

In general, it is interesting: after all, you write in the first post that it is inherent in more than one species. Moreover, it is not symmetrical. RippeR is right - there could be a lot going on here... entertaining.

30.05.2006 9:08, Dmitry Vlasov

Actually, Badister doesn't have a tenderloin on the outer edge of its mandibles. and the mandible (one, then the right one. then left) pincer-shaped. And the pointed end of the other mandible enters the recess-it turns out a universal "cutter".

30.05.2006 22:05, RippeR

People don't know what it is, and now many people can throw assumptions! So it's better to write a job, otherwise you won't have time and several PO people will do it for you! Don't lose your work!

31.05.2006 10:31, Aleksey Adamov

Actually, Badister doesn't have a tenderloin on the outer edge of its mandibles. and the mandible (one, then the right one. then left) pincer-shaped. And the pointed end of the other mandible enters the recess-it turns out a universal "cutter".

Precisely!!!! Zvynaite... redface.gif I probably read the article by E. V. Komarov when I was drunk.
And exactly the tenderloin is filled with the end of the other mandible? In the picture in the article, the tenderloin is free of the second mandible.

By the way, here is this drawing:
 the image is no longer on the site: Badister.JPG 

This post was edited by Adamov - 05/31/2006 10:38 am

Pictures:
Badister.JPG — (16к) 31.05.2006 — 14.06.2006

31.05.2006 11:02, Dmitry Vlasov

It is necessary to look at live beetles, because in the drawing they (mandibles) can be "separated" for better understanding.

02.06.2006 14:36, Bad Den

2 Adamov
It might be worth looking at this article:
Acorn J.H., Ball G.E.
The mandibles of some adult ground beetles: structure, function, and evolution of herbivory (Coleoptera: Carabidae).// CANADIAN JOURNAL OF ZOOLOGY 69(3) 1991: 638-650, illustr.

Inofrmatsiya extracted here:
http://www.zin.ru/Animalia/Coleoptera/rus/car_res.asp
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