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Cellar Spider ? 1 of 4

Cellar Spider ? 1 of 4
Wilton, Inland Barrens, Saratoga County, New York, USA
September 6, 2011
This is an IMPRESSIVE and large spider by far exceeds 2 inches in breadth, and is the largest spider I've found working a web in my basement! Looks like the cellar spider group. ID to species?

Images of this individual: tag all
Cellar Spider ? 1 of 4 Cellar Spider ? 2 of 4 Cellar Spider ? 3 of 4 Cellar Spider ? 4 of 4

Moved from Spiders.

Moved from ID Request. Mandy may be able to tell us more. I know she was studying this family recently.

See this female from inside
same home. . .seems to be different species:

Not an expert ID
But it really really looks like a Pholcus phalangioides to me. I think they can be quite impressive, especially with the legs...

Yes I agree that this
really looks like P. phalangoides. But I'm suspicious due to the size that it might be a cryptic look alike. For P. phalangoides the guide lists Female: 7-8mm. Male: 6mm. I think- but am not positive this is a male spider- we'll wait for the experts. This spider is 13mm- I just measured it. I guess it could just be a huge specimen?

Best Gaspard, and thank you!

I was just about to email you and ask what his body size was... I'm going to be taking a look at my extra-large one today (finally) to see if it's P. phalangioides. Yours is 2mm larger than mine, actually! And I thought mine was big! I guess if you include his palps in the measurement, that might account for it, since I didn't... but either way, we have some big specimens compared to the average male. Some European references say that the male P. phalangioides are 7-10mm, but multiple North American references say males are 6mm. Size can be really variable in many species, though, so I'm not convinced it means we have a different species. I know I said almost two weeks ago that I'd check mine, but I think I'll finally get to it today/tomorrow and let you know how it turns out. My money is on just a large P. phalangioides.

Just remeasured it with a very exact metric ruler
and it is clearly 12mm if I do not consider any extension of the pedipalps. When it was not chilled, yes, the palps were more extended and very likely gave me an extra bit. So mine AT LEAST matches yours and could be 1mm longer if we correct for folded pedipalps.

I wonder if there were too introductions of two morphs from Europe, one more recently? An earlier morph that was historically more common and only up to 6mm? This might account for the discrepancy. Its obviously much bigger then any P. phalangoides I have seen in any home in the east but again might not mean anything. Or of course it could be that they always ranged up to 10/11/12 and/or there are subspecies level differences not ID'd yet? GOOD LUCK!


Mandy no rush I'll have to
Re-measure mine, yea, it could be with pedipalps. And, I have the key with the pedipalp characters and just got my scope back from on loan. So I might even be able to confirm on this end either before or after the fact. The spider here is still alive. THANKS!!!


ID correct
cellar spider. great pictures too.

Given the high level
of endemics in my inland barren area, this large spider might be worthy to lend a species too. . .if one is not already there.

It matches in phenotype some of the common Pholcus sp. that are from 4 to 6mm. But this one dwarfs those. K.

Looks near
and this

Happy to send this spider for further work to someone.

Yes but does its massive size
lead to a species? I saved this spider. It bar none, out sizes any cellar spider I have seen. Ever. Its VERY impressive.

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