Forum europäischer Spinnentiere

Praktisches und Organisatorisches (Other topics) => Rätsel und Kurzweil (Brainteaser and disport) => Thema gestartet von: Raffaele Falato am 2021-04-17 12:54:45

Titel: Quizitaly n. 2 => again Alopecosa albofasciata
Beitrag von: Raffaele Falato am 2021-04-17 12:54:45
Another quiz for anyone who likes to try to identify spiders.

This species is not present in Germany, in Switzerland yes.

I believe it is a sub-adult specimen, measuring 7 mm, and I have find this April males and females of this size pictured in this way.

You will not find photos of it neither on the wiki nor on UniBe.

I was not expecting also a similar pattern.

Beware of the pitfall.

Good game everyone.
Raf

quiz2.jpg
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Titel: Re: Quizitaly n. 2
Beitrag von: Jutta Asamoah am 2021-04-17 22:22:43
Hello Raf,

I need to clarify, whether The "pitfall" is the double negation of not...neither...nor resulting in a positive statement?
If that was just an accident, then I won´t stand a chance. Otherwise I will immediately dive in the pool of possiblities  :D

Cheers
Jutta
Titel: Re: Quizitaly n. 2
Beitrag von: Raffaele Falato am 2021-04-17 22:34:32
Hello Jutta.
Double negation is negation, the trap isn't here but I can't say more, the quiz would become easy.
And then there is an important clue that I have already given above.

Raf
Titel: Re: Quizitaly n. 2
Beitrag von: Jonathan Neumann am 2021-04-18 14:18:06
Dann ist das wieder eine Alopecosa? When you solved the species, can you please tell us how to ID?

lg,
Jonathan
Titel: Re: Quizitaly n. 2
Beitrag von: Jutta Asamoah am 2021-04-18 14:27:38
Aber es gibt ja keine Alopecosa, die alle drei Kriterien erfüllt, also präsent in Italien und in der Schweiz, nicht präsent in Deutschland und ohne Foto in Wiki und unibe.ch.

Verzweifel :'(
Titel: Re: Quizitaly n. 2
Beitrag von: Raffaele Falato am 2021-04-18 14:31:00
Hallo Jonathan,
Bitte schreiben Sie Ihre Vermutung.

@Jutta
Trap. You don't understand, dear.
The photos are there, but they show a different pattern.
Titel: Re: Quizitaly n. 2
Beitrag von: Jonathan Neumann am 2021-04-18 15:10:40
my next guess is Arctosa?
Titel: Re: Quizitaly n. 2
Beitrag von: Raffaele Falato am 2021-04-18 15:25:20
Hey Jon,
why did you change genus?  ???

The spider is identified not by the opisthosome (unless someone has already seen it in this dress of his) but by the written suggestions and the circumstance that I am not a great connoisseur of spiders, and yet ...  ;)
Titel: Re: Quizitaly n. 2
Beitrag von: Raffaele Falato am 2021-04-19 20:20:48
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.  :D

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)
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A sub-adult male of 7 mm
q22.jpg
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Another immature female of 6 mm
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Ventral section common to all 3 spiders in the photos above
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