An unidentified Mamm (I think) from my trip

I found this plant about 40km south of Huizache Junction and abou 1km east of the MEX-57D in SLP. There were about 7 heads growing from a large taproot. It appears to have about 8-10 white radial spines and one hooked dark central. Each head is about 2cms across.



The closest that I can come to, if indeed it is a Mammillaria, is M. surculosa, but if it is it isn;t what I know as M. surculosa.

Any ideas would be very gratefully received.

I have a few more to ask about as well, which I will put up over the next few days.

why not mammillaria uncinata?
there is a second central spine in three highter ereolas....
like often in mammillaria uncinata.


sometimes central spines are not hooked like in this plant from slpotosi...
m.uncinata Z 86

Thanks, Maurillio,
I have seen uncinata plants with straight spines, but I didn't immediately think of that species., as the heaeds were so small. However, I think that it might be possible that the original head had been eaten and the smaller heads have sprung up from the taproot. Thanks very much for the suggestion....