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Photo#712646
Castianeira longipalpa? - Castianeira longipalpa - female

Castianeira longipalpa? - Castianeira longipalpa - Female
Cowichan Valley, British Columbia, Canada
October 8, 2012
Size: ~10mm body length
Found in the sliding door to the backyard. It's funny all the things that show up when you're not looking for them!

I'm thinking Castianeira rather than Micaria here. There are no iridescent scales, the endites don't appear to have any depressions as mentioned for Micaria on the info page, and the spinnerets do seem a bit tapered. Also, from Dondale & Redner 1982 I think I see what they mean by the notched trochanter IV in the ventral view, which is not found in Micaria according to Platnick & Dondale 1992.

I think Castianeira longipalpa is the only species in BC that would look like this. What's visible of the epigynum seems to be a good match as far as the copulatory openings go.

Images of this individual: tag all
Castianeira longipalpa? - Castianeira longipalpa - female Castianeira longipalpa? - Castianeira longipalpa - female Castianeira longipalpa? - Castianeira longipalpa - female Castianeira longipalpa? - Castianeira longipalpa - female Castianeira longipalpa? - Castianeira longipalpa - female Castianeira longipalpa? - Castianeira longipalpa - female Castianeira longipalpa? - Castianeira longipalpa - female

Image added
Totally forgot - I got a shot of the eyes too, showing the shape of the PMEs. According to the Micaria info page:

According to SONA
- all gnaphosids (Micaria) have irregularly shaped PMEs, Castianeira are round

Btw, it looks like the yellowish hairs on the carapace are feathery. Reminds me of Agelenids.

Castianeira longipalpa
Nice ones! When you get some great voucher shots like this it's good to put them on the info page. (see what I've done) I can't remember why the ventral spination on tibias I and II are important in this species. That info should also be added to the info page.

(By the way... it's nice to have you back too Kevin!)

 
Tibia spination
I don't know if the spination matters for the species, though I gathered from the Micaria info page that it was important for the genus:

Kaston's how to know the spiders tells the difference between Castianeira and Micaria as
- The well marked thoracic groove in Castianeira.
- Tibiae I & II have two or three pairs of ventral spines in Castianeira

..
It's good to have images like this (particularly when Rod has given his blessing), as the epigynum diverges somewhat in appearance from Paquin's drawing, and without having seen numerous specimens it can be difficult to know how much variation is possible.

-K

ID confirmed by Rod Crawford
"The first one is clearly C. longipalpa by the epigynum."

Moved from Spiders.

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