I searched for a while tonight and now remember why I still feel unsure of what kind of oscularia I actually have. I still need to take a pic for you. I thought I had one but can not find it. Mine has 3 or more teeth on each side of leaf with red stems. As far as I know this is oscularia deltoids. If you would like being cross eyed read this thread ......
The thread "Same photos in two species. Lampranthus deltoids and Oscularia vredenbugensis" in
Cactus and Succulents forum
This is not the thread I was thinking of earlier, but is a good example of why there is so much confusion. Sorry, if I had known this would be so complicated I would not have suggested it.
