Per Lang’s comment:
Yes. That is not discussed in any text, and not EXPLICITLY discussed even in the Abhidhamma Piṭaka of the Tipitaka.
– Waharaka Thero had discussed that in a couple of discourses.
Basically, the Paticca Samuppada process splits to two at the “namarupa paccaya salayatana” step.
– One set of salayatana are those of LIVING BEINGS (hadaya vatthu/pasada rupa).
– The other set leads to the arising of external rupa.
But it is not necessary to understand the extra process. We just need to understand how different types of bhava (and jati) arise for a living being.
– That just depends on the particular kamma and DOES NOT belong to a “self”.
I will discuss that further in the next post.
P.S. We started that discussion with the last post, “Sakkāya Diṭṭhi – Wrong View of “Me” and “Mine”