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TaxonomyBrowseInfoImagesLinksBooksData
Photo#669068
Callobius? - Callobius pictus - female

Callobius? - Callobius pictus - Female
Cowichan Valley, British Columbia, Canada
July 5, 2012
Size: ~12mm body length
Found crawling on a wooden structure in the yard. I'm reasonably certain this belongs in genus Callobius, but I'm not sure where to go from there.

Images of this individual: tag all
Callobius? - Callobius pictus - female Callobius? - Callobius pictus - female Callobius? - Callobius pictus - female Callobius? - Callobius pictus - female Callobius? - Callobius pictus - female Callobius? - Callobius pictus - female

From Rod Crawford
This is certainly not C. severus - probably pictus. However, in Callobius one really wants an in-focus ventral view of the metatarsus (next to last segment) of the first or second leg. RC

Moved from Spiders. I moved here on Rod's probably. So ID isn't 100% certain, but I think this is still a good placement.

 
Thanks
Learning something new every time - I'll remember to do a ventral metatarsus shot next time I work with a suspected Callobius.

 
Yes,
I probably knew that at one time as well. However, I'd since forgotten it. It's hard to remember all the different rules for all the different types of spiders!

Updated epigynum shot
Made another attempt at it, this time with harsher lighting. Seems to have made the shape a bit more evident. Any better?

EDIT: made one more try, think it's improved a bit more.

 
Callobius
Great shots. I've emailed Rod.

..
I can't remember -- you do collect these specimens? With such lovely images it would be a pity not to be able to confirm the species (and there are so many Callobius species).

-Kevin

 
I don't collect any of
the individuals I shoot. Unless otherwise noted, they're all alive, healthy, unharmed, and unhindered (no chilling, etc.). I do sometimes keep them for a day or two before releasing them though (longer in the case of one Cybaeid I'm trying to rear to adulthood).

I agree it would be unfortunate if an identification couldn't be reached on account of a few hairs obscuring vital areas, but there'll always be more chances! :)

Callobius "NW"
Do you think she'll sit still for a shave?

Bennett et al. (2010) list the following species:

Callobius canada (Chamberlin & Ivie, 1947)
Global: Southern BC south to northern OR & western MT
Local: Salmon Arm, Wycliffe, Cawston, Fountain Valley, Yale

Callobius enus (Chamberlin & Ivie, 1947)
Global: Southern BC south to ID & western MT
Local: Invermere, Nelson, Wycliffe, Summerland

Callobius nomeus (Chamberlin, 1919)
Global: Western NA, also in QC, LB, & NH
Local: Widespread in eastern half of BC

Callobius pictus (Simon, 1884)
Global: AK (eastern Aleutian Islands) south to mid-coastal CA
Local: Widespread at coastal localities, Fraser Valley up to Lillooet

Callobius severus (Simon, 1884)
Global: Southwestern BC to southwestern CA
Local: Widespread on Vancouver Is. & lower mainland


Between severus and pictus, the latter seems more likely to me, based on what one can see of the epigynum (not much), but perhaps Rod Crawford will be able to see more.

-K

 
Callobius "NW"
Wish she would!

I believe severus tends to be larger, so I'd guess pictus is a better bet too.

I'll fiddle around tomorrow and see if I can get anything more helpful on the epigynum.

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