Autor Thema: Small black spider => cf. Erigone sp.  (Gelesen 391 mal)

Raffaele Falato

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Small black spider => cf. Erigone sp.
« am: 2020-01-18 17:12:04 »
Gorgoglione, Province of Matera, Basilicata, southern Italy.

Discovery date: 26 December, 13:00
Habitat: 800 m - in the countryside.
Dimensions: about 2 mm.

Hello.
Spider found wandering on the railing of a bridge in the fields. Around, trees and low and medium vegetation.
I think it's another specimen of Linyphiidae Erigoninae, and therefore always a big problem (at least for me) for identification.
A greeting
Raf

f1.jpg
*f1.jpg (53.99 KB . 514x464 - angeschaut 142 Mal)

f2.jpg
*f2.jpg (34.95 KB . 496x395 - angeschaut 147 Mal)

f3.jpg
*f3.jpg (42.8 KB . 508x345 - angeschaut 153 Mal)
« Letzte Änderung: 2020-01-26 21:04:48 von Katja Duske »

Raffaele Falato

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Re: Small black spider
« Antwort #1 am: 2020-01-18 17:54:48 »
Mmm ... looking at it better, do you want to see that it is a Theridiidae?

Raffaele Falato

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Re: Small black spider
« Antwort #2 am: 2020-01-21 11:53:09 »
Hello everybody.
This spider is a source of doubt for me.
From the general aspect, and especially from the shape of the prosoma, it seems to me a Theridiidae, but the position taken in the second photograph reminds me very much a Linyphiidae Erigoninae.
Well, I still have to eat a lot of beans in this field, so I need your help.
Raf

Ari Kainelainen

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Re: Small black spider
« Antwort #3 am: 2020-01-21 14:39:57 »
Hallo, Raffaele!
I'm certain your species belongs to Linyphiidae. Most likely, it's truly female Erigoninae, but let's wait for other opinioins.

Michael Hohner

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Re: Small black spider
« Antwort #4 am: 2020-01-21 17:41:31 »
I also think it could be a female Erigone. But there are hundreds of similar species.

Raffaele Falato

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Re: Small black spider
« Antwort #5 am: 2020-01-21 18:22:41 »
Thanks guys for the help.
So at this point one thing should be certain: it is a Linyphiidae.
We have the family, and for me it is already a great result, given the doubts I had about it.
If then the genus hypothesized by Michael (Erigone) would also be confirmed, it would be the best; in fact, I don't expect the determination of the species for the reasons we all know. However, I never set limits, and considering the "monsters" who frequent the forum ...
Off topic: this forum is a real pleasure for me.
Raf

I also think it could be a female Erigone. But there are hundreds of similar species.

Michael, maybe you meant genres, right?  ;)

Raf

Raffaele Falato

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Re: Small black spider
« Antwort #6 am: 2020-01-25 15:10:44 »
Good morning.
After Ari and Michael's comments, I ask for advice on how to archive photos of this spider: cf. Erigone sp., or more simply Linyphiidae Erigoninae not identified?
Or should I wait for some more opinions?
Thanks in advance for your time.
A greeting.
Raf

Raffaele Falato

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Re: Small black spider
« Antwort #7 am: 2020-01-26 17:00:20 »
 :(

Tobias Bauer

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Re: Small black spider
« Antwort #8 am: 2020-01-26 17:46:41 »
cf. Erigone sp. is ok for me as well.

Tobias

Raffaele Falato

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Re: Small black spider
« Antwort #9 am: 2020-01-26 18:21:35 »
Danke Tobias.
Raf

Martin Lemke

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Re: Small black spider => cf. Erigone sp.
« Antwort #10 am: 2020-01-29 22:40:51 »
In my eyes Erigone sp. is hardly more likely than a whole list of other species that are small and dark. I do not find it imperative to name Erigone as probable.

As it looks like, this is a female (or young) with a slightly raised front part of the head. Seen from dorsally, the eyes appear almost ring-shaped arranged (the photo is quite insufficient), while the eyes of Erigone sp. are clearly arranged in two rows.

We should advise against presenting Microlinyphiidae here for identification by pictures.

Martin
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DAS waren noch Zeiten: Nowegen 2011.

Raffaele Falato

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Re: Small black spider => cf. Erigone sp.
« Antwort #11 am: 2020-01-29 22:59:38 »
Good evening Martin.
From what I understand, damned translator, it would be better to classify this spider as unidentified Linyphiidae, right?
In any case, I accept your advice, I apologize and I will no longer ask for the identification of such small and black spiders; sin, I still have 2-3 specimens to identify, in addition to the one published on January 28 and currently unanswered.
Will the Staff change the title of this discussion or should I do it?
A greeting.
Raf

Simeon Indzhov

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Re: Small black spider => cf. Erigone sp.
« Antwort #12 am: 2020-01-29 23:17:12 »
Unfortunately, I have to give Martin right here that small female Linys are largely unidentifiable from habitus photos since mostly genitalia are used during the process, or at least very fine somatic traits (trichobothria, for example) which a phone camera cannot capture so it is generally a waste of time to post them for ID :-/ On the other hand, like Tobias indicated, female Erigone and Prinerigone have raised heads and also, at good quality photos, one sees the denticles at the margin of the carapace so sometimes it is not that impossible to recognise something relevant, but these are largely the exceptions

Males are a bit different story as head shape and overall palp shape might be successfully captured on a macro photo and thus at least genus might be recognisable. Was the Gonatium male your post @Raffaele?
Simeon

Raffaele Falato

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Re: Small black spider => cf. Erigone sp.
« Antwort #13 am: 2020-01-29 23:30:52 »
Damn Google translator! Sometimes it is useless.
Sorry, Simeon, but I don't understand what you mean and who you talk to.
A prayer and a little patience: I ask all of you from the forum to use simple terms or expressions in our speeches. I risk not understanding what the translator translates.
Thanks for understanding.
Raf