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Unpainted beetles, how often do they come across?

Community and Forum → Taxonomy. Classification → Unpainted beetles, how often do they come across?

amara, 25.10.2007 14:32

On another thread, I was well advised that my suspiciously light Agabus is most likely an undyed copy, and in this case it fits perfectly in A. sturmi.
I want to ask those whose hands have passed more beetles than mine, how often do such unpainted beetles come across?
And are there any preferences for individual families?
Thank you in advance for your information.

Comments

25.10.2007 14:46, omar

Quite often there are under-colored ground beetles. Especially in wet, wet biotopes. Under-colored soil weevils are common, especially in the genus Otiorrhynchus. Very often, when I collect them, I still don't get fully colored beetles, even if I keep them alive for a few weeks. If someone disturbs the beetle while it is still waiting for complete hardening, and it is forced to actively move, it often remains undecorated for life.
Likes: 7

25.10.2007 15:29, Nimrod

This case, at least in many groups of Scarabaeoidea, directly depends on the living conditions of each specific species in a certain territory and its number. The most frequent cases of catching under-colored Copris, Geotrupes, Protaetia. Much rarer: Aphodius, Melolonthidae (pars), Rutelinae. The first, if you give them the opportunity to live for a few days, as a rule, acquire a normal color and hardness of the covers, echoing the second-unknown. And more. In this case, you can easily "get caught", because among the same Protaetia there are many forms whose outer integument color is similar to under-colored individuals, but the nature of their appearance is different. It seems that this is laid down in the larval stage of beetle development. Therefore, sometimes it is very difficult to determine whether a given copy is under-colored, or whether it is a melanistic form, so in general, the question is difficult, Mr. amara.
Sincerely,...
Likes: 7

01.11.2007 20:32, stierlyz

They often come across among the material in the light, and sometimes they fly so soft - you can't take them in your hands! They are found among plavuntsy, zhuzhelov, stafs, less often among vodolyubov, dolgash, but I have not met any under-colored barbels.
Likes: 1

05.11.2007 7:34, Mylabris

It is better to check with the KDG, but it seems to me that the barbels in the pupal cradle "dokhitiniziruyutsya". That's why they come out stronger.
Likes: 1

05.11.2007 12:34, Victor Titov

If someone disturbs the beetle while it is still waiting for complete hardening, and it is forced to actively move, it often remains undecorated for life.

By the way, as a child, after reading Plavilshchikov, I experimented with ladybirds: I brought them out at home and disturbed them, forcing them to move while the beetle's covers were still not hardened. Sometimes (but not always) cows were obtained with an unusual number of spots on the elytra.
Likes: 1

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