It is a Brown Widow. The scientific name is Latrodectus Geometricus. It is also known by the following names: Brown Button Spider, Grey Widow, Geometric Button Spider.
Brown Widow is normally lighter in color with shades of grey.
The 3D model of this Brown Widow comes with the following:
It also contains 3 jpeg texture files. 1 texture for the body, 1 for the right legs, 1 more for the left legs of the model.
All textures are 2048x2048.
It is only a diffuse (color) texture. The UV layout does not overlap, thus, makes it easy for anyone to edit the textures and/or parts of the textures.
There is a total of 4 shaders within the file. It is all label/name accordant to the texture names and the models body parts (3 shaders for the texture, 1 shader for the eyes of the model).
The model is made in Maya 2015. The images is just screen grabs.