It is possible that you are describing a Marbled Orbweaver spider, which is black with yellow or white markings. This spider can be found in North America and is not harmful to humans. It is important to observe from a safe distance.
An ant, or a spider!
black widow
I got bit by a spider fitting this description, and hurt very bad. Very small, black spider with two very small dots on its back(side by side), but I don't know what kind it is..left a pretty good welt, and red dot on my leg.
A small brown and black spider typically has a compact body, eight legs, and a color pattern that includes shades of brown and black. These spiders are often found in dark, sheltered areas and may have markings or patterns on their bodies that help them blend in with their surroundings.
a spider
It's difficult to definitively identify a spider without a picture, but black widows are rare in Pennsylvania. The black widow spider is known for its distinctive red hourglass marking on the underside of its abdomen, so if you didn't see this marking, it's unlikely to be a black widow. It's always a good idea to exercise caution when encountering spiders, especially if you are unsure of the species.
You can make Halloween spider legs out of black pipe cleaners for small decorations. Halloween costume spider legs can be made of black material or black tights.
The small brown spider with a black stripe on its back can be identified by its unique coloration and marking.
Most are.
The Red-back spider (Latrodectus hasselti) is commonly found in Australia. They are a small black venomous spider with long thin legs, and the females have a red stripe on their globular abdomen.
The spider you are describing sounds like a spiny-backed orb-weaver spider (Gasteracantha cancriformis). This spider is known for its distinct coloration, with a black head and legs and a gray body with spikes or spines. It is relatively small in size and can be found in shrubs and trees, where it builds its orb-shaped webs.