Mammillaria from Mexico 04 2018

Dear colleagues,
please help identify plants from Mexico.

road 190
near "Tancoyol de Serra"
Sierra Gorda Biosphere Reserve.
Keretaro, Mexico.

Possibly forms of m. magnimamma

1. Mam. priessnitzii?
2. 3. and 5. Mam. compressa
4. Mam. centralifera?

Thanks Delandmo, thanks Jonathan!!!
I agree with the opinion of Jonathan.
I think 2-5 plants are form of M. compressa.
If I understand the M. magnimamma has curved spines, no?
This is M. magnimamma, yes?

27.02.2018
Near Mineral del Monte.
Hidalgo, Mexico.

I would call number 1 M. priessnitzii, number 2 and 5 centralifera. Number 3 and 4 are probably also centralifera, but it looks like they have shorter spines because they grow in a less exposed position. Of course, you might consider centralifera as no more than a form of compressa.
The Mineral del Monte plant I would call magnimamma. M. magnimamma often has curved spines, but I think that at some locations you can find them with nearly straight spines.

Wolter ten Hoeve.

Dear Wolter,
Thanks for your reply!
Probably this plant can be called M. compressa ssp. centralifera.

Here is another plant from this group that I do not know, perhaps M. magnimamma?

6.03.2018
Near Santa Maria del Rio
SLP, Mexico.

In Pilbeam's book M. centralifera is indeed considered a subspecies of M. compressa.

I label the plant near Santa Maria del Rio as M. saint-pieana. Reppenhagen reported it from that area, and I found similar plants in that region. I found them at the beginning of the road to Cañada de Yañez, east of Santa Maria del Rio. But M. saint-pieana is probably no more than a form of M. gigantea.

Wolter.

Dear Wolter,
Thanks for your ansver!
You are an excellent specialist!
I now regret that I did not collect this plant for my collection.