The bony landmark of the sacrum that makes up the lateral surface and articulates with the ilium is called the

auricular surface

Explanation:

The bony landmark of the sacrum that makes up the lateral surface and articulates with the ilium is called the auricular surface.

The auricular surface is given the name because it looks like the shape of the ear. It is cartilage coated and articulate by the sacrum. It should be noted that below the auricular surface, we have the preauricular sulcus.

An ecosystem with a large number of species is said to have Biodiversity