Observation 114774: Arachnida

When: 2012-10-28

Collection location: Sweet Valley, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

On the gills of a laccaria mushroom, probably Laccaria laccata. I have observed this webby stuff on the undersides of laccarias in two different locations. Other mushrooms in these locations did not show the webby stuff.

I mounted the webby stuff in KOH. The white color of the webby stuff (as seen in the first photo) is probably due to the spore drop from the laccaria, as evidenced by the clusters of spores seen in the micro photos. One micro photo turned up a spiny globose object. Although other globose objects were viewed through the scope, I think these other objects were not the same as the one spiny reddish thing. I suspect this spiny thing is just something that drifted in and ended up on the slide.



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Laccaria is mycorrhizal.
By: Daniel B. Wheeler (Tuberale)
2012-10-30 23:05:44 -05 (-0500)

And I’ve seen lots of insects fighting in and on it. Maybe that’s what’s drawing the spiders in?

Yeah, Daniel…
By: Dave W (Dave W)
2012-10-30 19:57:26 -05 (-0500)

the Laccaria/spider correlation (if this, indeed, what we are viewing… seems like it) is interesting. Other types of gilled mushrooms in the same areas and type habitat do not show the web remnants on the gills. Some strange symbiotic relationship…?

By: Daniel B. Wheeler (Tuberale)
2012-10-30 16:13:16 -05 (-0500)

acting as a mycofilter, I think. Laccaria in my area has a lot of cobwebs on it until the first freeze or heavy frost. Then nothing. Seems to be a strong correlation between active Arachnids and presence of cobwebs especially on the underside of Laccaria.

Created: 2012-10-29 01:07:54 -05 (-0500)
Last modified: 2012-10-30 16:10:26 -05 (-0500)
Viewed: 50 times, last viewed: 2017-06-14 07:26:34 -05 (-0500)
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