Identification Mammillaria? Thanks

This one is a bit of a mystery. But looking at the spines, which tend to be somewhat curved, I would suggest the possibility of it being a white spine variety of m.rhodantha.

Its a bit difficult certainly. A sense of scale would be useful, though it looks like a large plant.
My thoughts go to either M. muehlenpfordtii which has pink flowers and can divide dichotomously; I did wonder about spinosissima ssp tepoxtlana, but that is a taller plant.

I too considered m. spinosissima ssp. tepoxtlana, but as you say Chris this tends to be more columnar. I also thought about m. muehlenpfordtii as well. but thought their spines are more robust and spiteful than this plants spines. Of course, if the plant is not as big as we suspect, it could add some more names to the list.

It looks like a rhodantha-form to me, possibly a form of M, pringlei.
M. muehlenpfordtii has more radial spines than this plant.

Wolter.

I agree with Wolter this looks pretty much like Mammillaria pringlei I have similar plants like this in my collection.