The brown recluse (No, the brown recluse is brown, not black. It also has black pattern on its back resembling a violin. Thus, the brown recluse's nickname of fiddle-back.)
The black spider that resembles a black widow without the red hourglass marking is likely the false black widow spider (Steatoda grossa or Steatoda nobilis). They are similar in appearance to black widows but lack the distinctive red hourglass marking. These spiders are not as venomous as black widows but can still deliver a painful bite.
black widow
The black widow is the only spider in Georgia known to resemble a black widow but be entirely black. If you spot a black spider in Georgia that looks similar to a black widow but is completely black, it is likely a black widow spider. While rare, variations in color can occur within the species.
Araneus diadematus(AKA cross spider) is the only spider i can think of that i know of that is brown/black and has a cross on its back. Here are some photos. http://www.nicksspiders.com/nicksspiders/araneusdiadematus.htm
The spider you are referring to is likely the black widow spider. The female black widow has a distinct red hourglass shape or white crescent on its abdomen. They are known for their venomous bite, so caution should be taken when encountering them.
If its black, has a large butt and there's a red shape on its back the resembles an hourglass, then its a black widow spider and they are very poisonous
The spider with a black line on its back is commonly known as the black widow spider.
The American Black Widow should have nothing upon its back but the black color it is. Specfically, the hour glass is on the belly of the spider.
The black spider that resembles a black widow without the red hourglass marking is likely the false black widow spider (Steatoda grossa or Steatoda nobilis). They are similar in appearance to black widows but lack the distinctive red hourglass marking. These spiders are not as venomous as black widows but can still deliver a painful bite.
black widow
Yes, the black spider with an orange dot on its back is likely a black widow spider, which is venomous.
black widow
Black widow
A black widow spider is black with a red mark on it's abdomen; this might or might not be what you meant. The black widow sometimes has a red mark on her back, as well. The red backed spider of Australia, a relative of the black widow, has an orange red mark on the back.
A black widow. This spider is only a black widow if the entire spider is black, with a round-ball looking back-body, female variety if there is a red hourglass shape marking on the underside of the spider. From the top black widows are completely black.
The black widow is the only spider in Georgia known to resemble a black widow but be entirely black. If you spot a black spider in Georgia that looks similar to a black widow but is completely black, it is likely a black widow spider. While rare, variations in color can occur within the species.
The black widow spider.