help is greatly appreciated!

[sadhbh-rua]

hi there, over the past year ive accumulated a number of succulents and cacti (of which 90% have no ID!)
but i dont want to overwhelm anyone so ill just ask if you could help ID this one for me?

i thought the plant was small and that it still had plenty of room in the pot it came in, so unfortunately i put off repotting.
to my surprise when i finally upended the pot there was no soil in it past the topsoil. the plant has a huge taproot 3 or 4 times the size of the plant itself and it took up the entirety of the little pot it was in. hopefully it didnt do any lasting damage being left like that but the newest spines seem a bit gnarly and stunted.
id love to find out what it might be

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[adetheproducer]

Coryphantha of some description. More answers will follow I am sure.

[vlani]

Coryphantha maiz-tablasensis? A but odd to get it without name.

[sadhbh-rua]

thank you both for the help! i actually got it in a hardware shop in amongst the other poor "novelty" plants so no ID is to be expected.
finding out the identity of what you got is half the fun (so long as it dosnt bring a mealy infestation home with it!)

[7george]

Coryphantha maiz-tablasensis? A but odd to get it without name.

Looks to me too.