mammillaria aljibensis?

this plant was sowed like mammillaria aljibensis....
in literature, we found that is similar to mammillaria perbella, bur for me is similar to mammillaria crinita....
or this is not a mammillaria aljibensis?

Well, as aljibensis is supposed to be a synonym of perbella, I think we can be pretty sure.
It could be a form of Mammillaria nana, which is a very variable species. The form of this that I have in my collection that is closest in appearance to the plant shown is called M. vergelensis n.n., which is a Piltz name for a plant found near El Vergel.
It is also reminiscent of M. tezontle, whose affiliation is more to crinita, I think, than M. nana.
Sorry I can't be more specific, I find these Stylothelae very hard to be precise about - as I guess many other more learned people have as well, hence the proliferation of names.

Olla! Ich stimme ein mit Chris. das ist M. nana!