Can you write why Onychiurinae? I do not question your determination.I want to learn something.
I don't see PAO, AIIIO and pseudocelli. The specimen is quite deformed. Large granulation, small anal spines. I suspected the Willemia genus.
Is there a specific feature indicating Onychiuridae? Are you based on your experience?

Indeed the specimen is quite deformed. So it can be my imagination, but I seem to recognise at least 2 structures that resemble a pseudocellus : one on the back margin of the head, and one on abd.4. Also the very distinctly long narrow unguis reminded me at Onychiurinae (Onychi- is derivered from onyx and refers to nail, claw). But I will check your suggestion of Willemia against Christiansen & Bellinger 1998.

This is not Willemia. I compared the claw with pictures from the paper:
D'Haese, C. 1998. Willemia anophthalma-group (Collembola: Hypogastruridae): Systematics, new species, distribution and habitats., Eur. J. Entomol. 95, 1998, p.581-592.

and in the picture is different.

The top of the antenna does not match either.

Using your suggestions, I checked the fourth abdominal segment.
I think there is a pseudocelli there:
https://static.inaturalist.org/photos/72454139/original.jpg?1589296773
You're right - this is Onychiurinae.
Thank you so much for help.

I have added images with more detail if this helps. Thanks for the identifications.

Thx. The new images confirm the original ID.