Are all holiday cactus Schlumbergera or Zygocactus

My new starters have new segments. I want to move them to a new hanging pot. How many pieces go in say a 9" pot? How far apart.

It is over 90 with 15% humidity outside in the shade. My house is 74 not sure of the humidity. I have them near a solar screened window.

They are all Schlumbergera. Zygocactus describes the growth habit and was the original genus name.

Easter Cactus are genus Hatoria, a type of Rhipsalidopsis.

I would put 5 - 6 plants In a 9 inch pot