Lavalantula

The titular creature in the 2015 movie Lavalantula.

Appearance
It is a coal black spider. Its eyes are reddish orange. Their mouths drip lava. Their queen was as tall as a house. Their bites look like burns. When bitten, eventually what appear to be juvenile Lavalantula swarm out of the victim's mouth and proceed to burn them alive. Despite their immense size, even the queen was able to crawl up walls. They don't spin webs. Everything about them was super-heated. Mixing their blood with gasoline caused an explosion.

Florida Lavalantulas are larger, hotter and nastier. Their queen was the size of a large building. They were capable of shooting spines from their abdomen.