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Hello everyone, for me Mammillaria is really complex to identify. I listed through the llifle and had some thoughts but some confirmation would be appreciated.
Also the last one is not known for me at all.

1 Image:
Plenty of similar cacti
Mammillaria brauneana
Mammillaria cadereytensis
Mammillaria dealbata
Mammillaria elegans
Mammillaria haageana
Mammillaria albilanata subs. oaxacana
2 Image:
Found only one similar
Mammillaria pachycylindrica
3 Image:
Went through all Gymnocalicium family on llifle but didn't find anything similar. Don't know the starting point

yukomkom wrote: ↑Thu May 19, 2022 7:40 am3 Image:
Went through all Gymnocalicium family on llifle but didn't find anything similar. Don't know the starting point

20220518_152502-min.jpg

Eriosyce, possible E engleri.

I would suggest 1 - Mamm.haageana, 2 - M.zeilmanniana
I was born in Vinnytsia, Ukraine. Hope it is safe where you are now. Praying for Ukraine and Ukrainians.

Thank you for helping, I really appreciate it
Lucy_V I live in Lviv, it's western part of Ukraine, it's pretty safe and also Vinnytsia is safe nowadays. Thanks a lot for your support)))

Mammillaria woodsii
M discolor? ginza maru??
Gymnocalycium horridispinum

Thanks a lot for your help, I checked all sources you've sent.
1st image I still don't feel for sure which one is that Mammillaria haageana or Mammillaria woodsii. Both has 2 central spines and plenty of radial. I believe it's not critical then, as I said in the beginning, Mammillaria is difficult for identification IMHO
2nd image is very similar to Mammillaria discolor;
3rd image is definitely Gymnocalycium horridispinum (I missed it somehow )

1 NOT haageana IMHO

1 is not haageana IMHO, it's from hahniana group with lack hair

anttisepp thanks a lot for helping I really appreciate it)