Please help me to identify this cactus seedling

[The_Nikon_Guy]

Hi All,
About 8 months ago I purchased some Epithelantha micromeris seeds an germinated around 15 of them (from 25 seeds).
I got a pleasant surprise when one of the seedlings seemed to be quite different from the normal Epi Micro charecteristics.
I have attached a coupld of photos showing details of this unknown seedling and was hoping one of you cactus gurus could help identify this?

IMG_20200417_144847.JPG (94.83 KiB) Viewed 1370 times

Thanks a ton in advance!

[anttisepp]

Thelocactus hexaedrophorus?

[The_Nikon_Guy]

Nice, you could be right!! - I googled up the name and compared my photo with those out there and it certainly matches up - thanks mate.

[anttisepp]

You're welcome

[The_Nikon_Guy]

In the meantime, I requested some information about this seedling from the seeds seller. He responded with a photo of the plant most likely to be the source of the seed. Unfortunately he hasn't identified the plant by name.
I was wondering if you were in a position to positively identify this mature plant (image below)

sergei_unidentified_seedling.jpg (127.87 KiB) Viewed 1271 times

[Dodi Russell]

Thelocactus hexaedrophorus

[The_Nikon_Guy]

Thanks Dodi !