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johnsoni group (Phidippus johnsoni group)
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Phidippus johnsoni
Photo#506290
Copyright © 2011
Hartmut Wisch
Phidippus? -
Phidippus johnsoni
-
Onion Valley, elev. 2800m, Sierra Nevada, Inyo County, California, USA
August 8, 2009
Images of this individual:
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Contributed by
Hartmut Wisch
on 16 April, 2011 - 6:09pm
Last updated 19 November, 2011 - 4:44am
Moved
Moved from
Phidippus ardens
. GB Edwards looked at the images and his opinion is that this jumper is johnsoni, although ardens was a close second-:)! Although both are found at this elevation, he thinks ardens wouldn't show the small white abdominal spots at this stage.
…
Lyn Atherton
, 19 November, 2011 - 4:44am
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Moved
Moved from
Phidippus
.
…
Lyn Atherton
, 25 May, 2011 - 10:50pm
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Identification criteria?
Just out of curiosity, what makes you think
ardens
on this Phid? Immature
Phidippus
are extremely variable and can change appearance drastically during molts. I'm just wondering what the rationale was for this move.
…
Ben Coulter
, 25 May, 2011 - 11:25pm
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I could be wrong about the ID
I could be wrong about the ID as ardens, but based on Edwards' revision of Phidippus, it appears to me that, of the similar species, only ardens and johnsoni are found both in this range and at this elevation in CA. Even in this molt, I'd think johnsoni male wouldn't show the extensive amount of black, the prominent basal band, or the white spotting on dorsum of abdomen, and female would show some evidence of the two oblique lateral stripes. The latter feature and the elevation also seemed to rule out clarus. But I'll be with GB Edwards in a few weeks, and will ask him to review images, to either confirm or correct ID.
…
Lyn Atherton
, 26 May, 2011 - 4:16pm
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Cool
No worries, Lyn. I appreciate the reply. It would be great to have his input on all the images. We have dozens of pages of unidentified
Phidippus
. I am not great on the western ones, but the markings appear superficially similar to other species known from CA, and the immatures are an ID nightmare. Check out Jay Barnes' princeps
here
and
here
for some perspective. The other
ardens
on BG just look subtly different to my eye. Maybe we should keep immatures separate unless they are reared to adulthood or are identified by an expert.
…
Ben Coulter
, 26 May, 2011 - 7:28pm
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Thanks, Lyn!
Other than taking specimens to the LANHM for ID, which I did not in this case, I don't know spiders beyond a few broad categories.
…
Hartmut Wisch
, 26 May, 2011 - 4:23pm
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Moved
Moved from
ID Request
.
…
Ben Coulter
, 17 April, 2011 - 12:08am
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Thanks, Ben -
I'll check it out when I have time.
…
Hartmut Wisch
, 17 April, 2011 - 7:22pm
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