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Hi forum,

I was wondering if this is Allacma fusca?
Not an adult one, but a juvenile perhabs?
I found it on bark of a tree.

Or what else?

greeting, Robert Heemskerk

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No Robert it is not Collembola at all.
My test it is most probably Psocoptera.
Nikita
Robert, please, give size and other usefull infirmation, as a result you'll ger more and more precise ID.

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Hi Nikita,

Size; about 3 mm
I can't find any wing (Psocoptera), but juvenile Psocoptera could be wingless?

Robert,

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1. In this case it is not Psocoptera also. My best guess is juvenile Gryllidae.
2. By the way. On my site www.Rosfoto.ru on key word "collembola" one can find about 80 images of Collembolas. All images checked by Mikhail Potapov, one of the world Collembola expert, so you can trust all ID.
Nikita

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P.S. Thinking about Collembola I excluded Psocoptera.
So, my test:
it is juvenile Gryllidae or less probably Psocoptera.

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Hello Robert,
I would also say it's a bark louse (Psocoptera).

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Hi Robert,

For your information, there are also several species of Psocoptera that have wingless adults. Just think about the Psocoptera you find indoors.

Jan Willem

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It is Psocoptera and I can even tell you it is an adult female of the genus Mesopsocus (Mesopsocidae). This specimen belongs to a group a five closely related species of which only M. unipunctatus was recorded from the Netherlands up to now. The present picture does not permit further identification than this species group (genital structures need to be examined).

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This evening I found one with wings!

Perhabs this is also Mesopsocus, but another sp.
But they are not totaly different, I see also some similarity.

greeting, robert

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2

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Ah, well now, this is a different species, and it even belongs to a different family.
This is Psococerastis gibbosa of the family Psocidae. One of the species with very long antennae.

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Paul knows (almost) everything!

thanks a lot!

robert,