Mammillaria microcarpa?

I got this plant from Amante Darmanin himself as Mammillaria microcarpa Dar167. An accident (well, base rot is an accident in my book) left me with only a couple of offsets that took some time to reach flowering size, and to my surprise they looked like this:



I am thinking that some stray polen may have played some part in here. What do you think?

Thank you.

Flowers and tiny stems remind me of M thornberi ssp yaquensis.

Wiebe

I agree, Wiebe, it does look more like M. thornberi., but probably not yaquensis, whose spnes usually are darker, and stems slimmer. DAR167 comes from nr. Lukeville, Organ Pipe Cactus Natl. Mon., Pima Co, AZ. You can find M. microcarpa (grahami), M. tetrancistra and M. thornberi in that area. If the plants are not in flower, it can be quite difficult to identify habitat plants.
Amante Darmanin doesn't list M. thornberi, and DAR167 was the only Mamm that he collected in this area, the others being Ferocacti. He had collected DAR162, as M. microcarpa in Sonoyita, Sonora.
I suspect that this plant is M. thornberi, and that the identification is wrong. I doubt cross fertilisation is the case here, much less likely.

Thanks a lot, Chris and Wiebe. Maybe Amante will see this and brings his insight on this subject. Meanwhile, I'll amend the label.

Further to the discussion on one of my field numbers; The seeds I gave to Jfabiaio were from habitat (not 2nd generation seeds) so unless they had hybridised in habitat they are pure bred.

I was not aware of M. thornberi growing near Lukeville or Sonoyta (pronounced Sonoeeta) . As Chris remarked, these cacti look very similar in habitat and I only thought about M. microcarpa (grahamii) and tetrancistra. I immediately eliminated tetrancistra because it has larger seeds. I had been finding several cacti of the microcarpa type at Sonoyta and I crossed the boarder by mistake believing I was still in Sonoyta it was later when checked my primitive GPS that I realised I was in Arizona. There was only a crude Iron fence at the time. I was lucky, as later I saw boarder guards patrolling the area.
A group of M. microcarpa at Sonoyta, Sonora
A cristate plant at Sonoyta, Sonora


In flower at Sonoyta, Sonora

M. microcarpa from across the boarder, Arizona


What I thought to be a variable M. microcarpa which may well be M. thornberi

Excellent photos! Thank you, Amante, the last picture shows a plant that closely resembles mine.

Nice photos, Amante, and I'm pretty sure that the last one is indeed M. thornberi.

OK, Fabio - any seedlinsg still available?