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Photo#444553
Ventral palp - Marpissa obtusa - male

Ventral palp - Marpissa obtusa - Male
Austin, Travis County, Texas, USA
August 15, 2010
Size: 4mm excl. palps
I had trouble getting a strictly ventral view, so this'll have to do. I'll have to get my hands on some really fine white sand, something I won't loose the palps in.

This is actually the right palp in mirror image.

Images of this individual: tag all
Immature male dorsal - Marpissa obtusa - male Immature male side - Marpissa obtusa - male Immature male side face - Marpissa obtusa - male Adult male dorsal - Marpissa obtusa - male Adult male side - Marpissa obtusa - male Adult male side face - Marpissa obtusa - male Adult male ventral - Marpissa obtusa - male Ventral palp - Marpissa obtusa - male Retrolateral palp - Marpissa obtusa - male

Moved
Moved from Jumping Spiders.

Or "bird sand"
But practice first on a "non-critical" specimen. It takes only a really tiny speck. I am using sand once again, fine glass grains that I bought in England. It's not ideal because the glass grains are too shiny.

My good friend Arno recommends fine "bird sand" -- the sand you buy in the pet food shop for pet birds (often made from oyster shell). This is better, IMO, because the grains generally have a matte rather than specular surface. The only disadvantage is that you get the occasional dark grain or two.

Look for something light in color. You have to rinse it first; thereafter you can store it in a container with water.

-K

..
Hi, Joe,

Another thing that will hold a palp in place is a tiny dab of petroleum jelly on the bottom of the specimen dish. I use this instead of sand, and it works very well.

 
Perfect! I'll do that next.
Perfect! I'll do that next. We have a Marpissa here. UT's scopes are better than mine and I was able to see a fourth, small pair of spines on tibia I, so SONA placed it correctly. I'm trying to make sense of Barnes 1958 revision right now.

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