There is a lot of confusion about the name M. machucae. It is an invalid name for a form of M. spinosissima, but has been used for what is now correctly called M. manana.
It was a Senor Machuca who found M. manana, and it is a white spined, pink flowered, member of the Stylothelae, but rarely displays obviously hooked spines. It forms round heads, and offsets very easily. The flowers are a light pink, and nowhere as dark as M. spinosissima flowers are.
So, I guess the question is which plant you have. Certainly M. manana is featured in the section Mammillarias A to Z here, as well as in a number of other topics. Can you post a photo of your plant, or if not, then describe it so that we can help you sort out which is the right name for your plant.