Here’s a juvenile S. borealis, ventral side up, on a bright orange background.
S. borealis is different — where P. tepidariorum builds intricate three-dimensional webs and likes to hang suspended in space in the middle of them, borealis hugs corners and surfaces, and builds denser, sheet-like webs. They just have a different lifestyle.
It’s unfortunate that she wouldn’t roll over for me, because she has a lovely white dorsal median stripe on a dark body.
This one is P. tepidariorum, and is just a wee little baby, less than two weeks old…but filling out fast.
You might be able to see wisps of its web, but it just doesn’t show up well on this light blue background. I tried to highlight it by misting the container with water, which is why you see little droplets everywhere.