I have been an exterminator for nine years and have never ssen this species of spider any where. I can not positivley indentify this spider. Its black with 10 legs shiny black armor on its back and pear shape rear end. Id love to know exactly what kind of spider this is. Please help.

I have been an exterminator for nine years and have never ssen this species of spider any where. I can not positivley indentify this spider. Its black with 10 legs shiny black armor on its back and pear shape rear end. Id love to know exactly what kind of spider this is. Please help.
Because there are hundreds of thousands of species of spiders and this is an international site... it would help if you narrow this down to what small portion of the planet earth you reside on.

A spider has only 8 legs, so the other two may be mouth parts or antennae. Please post a photo and, like smoothy said, tell us your location.