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Bellota longimana (Gertsch) - Cheliferoides longimanus - female

Bellota longimana (Gertsch) - Cheliferoides longimanus - Female
Cameron County, Texas, USA
October 10, 2009
Bellota longimana (Gertsch)
Det. Wayne Maddison, 2009

Pseudoscorpion, Model - Spider, Mimic ??

Platnick, N.I. 1984. On the pseudoscorpion-mimicking spider Cheliferoides (Araneae: Salticidae). J. New York Entomol. Soc., 92(2): 169-173.


I found this post in looking
I found this post in looking for an id for my spider:

The picture is bad, but I've attached a video showing the interesting behavior. Are these spiders related?

Out of all the bug models out there, I would NEVER imagine a spider mimicing a pseudoscorpion! Or anything mimicing one!

Moved from Bellota wheeleri.

ID from Allen Dean
"No this is not Marpissa. It is Bellota wheeleri. A neat looking salticid. This is probably a female. The male has thicker 1st tibia. I have a few specimens from the Valley."

Alt Det. G. B. Edwards: "Bellota" longimana
Actually this is "Bellota" longimana (Gertsch), originally described in the genus Cheliferoides. Det. G. B. Edwards, 2009.

Although it sort of looks like a pseudoscorpion, it has been found on grasses, so pseudoscorpion mimicry is unlikely. The one that really looks like a pseudoscorpion and lives on bark is Cheliferoides segmentatus.

Of the two IDs offered
I'd have to lean towards longimana, based on the available descriptions and drawings for both species.

Gertsch's (1936) longimana (as longimanus) is on pp. 22-23 here.
Peckham and Peckham's (1909) wheeleri (as wheelerii) is on pp. 374-375 here.
Also compare the drawings for longimana and wheeleri; note carapace proportions.

One of the notable differences in the descriptions given that would be visible in your photo are of the colors of legs II through IV, which for longimana are noted as pale yellow, and for wheeleri the femur and tibia are described as dark brown.

Some problems with my admittedly weak confirmation:
-I'm only comparing the descriptions of two species. (well, three including B. micans)
-The descriptions are, as usual, of specimens in alcohol.
-Neither author gives a description for both species.
-A handful of IDs by the Peckhams (at least 20) have been regarded by later authors as incorrect.

So if you're looking for a good third opinion I'd recommend sending a link to Wayne Maddison for review, as he is probably the only other person on the planet to have photographed a live specimen. I'm consistently amazed at the depth and breadth of knowledge possessed by both Edwards and Maddison.

Congrats on photographing this rarity, and do take a quick look at the color plate of C. segmentatus for an even closer match to your pseudoscorpion.

Cool find
Awesome creature

Not sure about the genus, but Marpissa looks similar. M. bryantae, dentoides and obtusa are listed at "Spiders of Texas", but I can't find photos of any of them on the web so far... Great photo! I hope that Jay Barnes or another salticid expert will know this one!

I was thinking Marpissa also
I was thinking Marpissa also but haven't had a chance to look.

Great looking spider, Mike. What sort of habitat was it found in?

That is awesome!

I agree
What a great find! Very cool spider.

Mimicry of a 'pseudo' -- really cunning vs. a [why not mimic the real thing] lack of confidence.

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