I am always fascinated by the remains of insect and spider sheds. The lighter-than-air remains cause them to dance in the slightest breeze, but the detail of their former inhabitants are so revealing and beautiful. In spiders, they have a pop-top shedding style so the cephalothorax is removed like a can lid so the “new” spider can pull itself out of the tangle of old leggings.
When I touched it for a closer look, the shed dropped to the ground and landed on a mossy rock. It looked as if the spider was ready to run off again, but with its head oddly trailing behind.
As we approached the house, I checked the small pawpaw patch out back and noticed something disappear under the broad leaves of a small sapling. I eased my hand under the leaf and a spider popped back out on the upper surface.
And what a spider it was! I have photographed the female of this species, a magnolia green jumper, but had never seen a male. They are characterized by the two huge eyes in front and their insanely long chelicerae.
This little guy was quite active and bold. I had to coax it out from under a leaf at first, but then it tended to move toward the camera and even jumped on the lens a few times. I would then ease it back onto a leaf and start the photography dance all over again.
Both sexes have a raised “eye mound” with 8 eyes surrounded by orange. These spiders can scan the area in front of them by moving the rear of their lens (the actual “eyeball” is fixed since it is built into the carapace). Because the rear of the lens is the darkest part of the eye and it moves around, you can often see a jumping spider’s eye changing color as in the photos below. When it is darkest, the spider is looking straight at you, because then you are looking down into its retina.
This series of photos also shows the chelicerae (jaws) – the brownish orange appendages coming out beneath the eyes. Coming down on either side of those are the pedipalps (or palps).
Pedipalps resemble small legs, but, in males, they serve a reproductive function.
The tips of male pedipalps are modified with small swellings (that look like small boxing gloves) that contain a complex copulatory organ. Males deposit sperm from under their abdomen into a small sperm web and the then suck it up into the palpal organ. When he finds a receptive female, he inserts the palpal organ into a slit on her abdomen and squeezes out the sperm. I suppose it is safer that way considering she might want to make a meal of him. Probably another reason to have a lot of eyes if you are a spider.
Magnolia green jumper- my new favorite! Love your patience to get great photos!
Thanks, Eve. I spent about 45 minutes with this little guy…time well spent.
Mike, you are full of fascinating information I would probably never have cause to look up and would otherwise never know. Thanks you for sharing! I sometimes see these spiders and note they look different, but both me and the spiders move on. You help fill an information void I didn’t realize was there.
My feelings exactly — I love learning from you!
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