Well, Jutta recognized the spider (via PM)!
Alopecosa albofasciata also this.
The clues: same (partial) geographical distribution of the spider in quiz n. 1, Raf does not understand anything about spiders and yet ... (as in quiz n. 1), there is something that characterizes it and is visible to the naked eye (the dark ventral section with white spots).
The trap: same spider as in quiz n. 1 (many users will have thought of a different spider).
Brava Jutta, congratulations.
I realize that the quiz was a little difficult for those like me who are not of the "subject", but I was expecting participation from the experts.
The purpose of the quiz, in fact, in addition to the playful aspect, was to focus on how this species presents at least one variant to the usual pattern, not present in the wiki or even on UniBe.
Personally, it is the first time that I have encountered an abdominal pattern designed in this way, but I believe that for the more experienced this variant is known, even if it is a non-Central European spider.
At first, as a layman that I am, I thought this was the pattern of immature animals (I have not found any spider larger than 7 mm so far, males with clear palps and females - see photos), but a few days ago, on the Italian forum Naturamediterraneo, a user posted a photo of a female from south Sicily (captured this April) drawn as the spider in the quiz, but with a BL of 11 mm, therefore an adult.
Thanks to everyone and see you next time.
Raf
The spider of the quiz (immaure female of 6-7 mm)
q21.jpg (36.11 KB . 719x468 - angeschaut 212 Mal)A sub-adult male of 7 mm
q22.jpg (49.29 KB . 795x627 - angeschaut 210 Mal)Another immature female of 6 mm
q23.jpg (38.2 KB . 777x636 - angeschaut 221 Mal)Ventral section common to all 3 spiders in the photos above
q24.jpg (29.18 KB . 365x499 - angeschaut 223 Mal)