What is this arachnid?
Saw this on my front door today, is there an arachnologist you know who can identify it? It was a bigger spider than I typically see around here roughly the size of the largest wolf spiders I see here. To give you an idea the body was as big as my pinky fingernail and if you include the outstretched legs about the size of a silver half dollar.
Thanks for sending us your arachnid. That looks like a black harvestman with some mite parasites. Harvestmen are non-spider arachnids in the order Opiliones. You can often quickly tell a harvestman from a spider by the way the body segments appear fused. In spiders you can see the distinct two segments, but on a harvestman the cephalothorax and the abdomen look like just one connected segment.
I don't know the species pictured in your photo, but it's very similar to this one, so could be in the Protolophus genus.
Collection Associate Jennifer Maupin, Ph.D.