Then

1. Seed/Angel
2. Series-A
3. Series-B
4. Series-C
5. IPO

Now

1. Pre-seed
2. Seed - If a seed round is too big, it is called a mango seed.
3. Seed extension
4. Angel
5. Series-A
6. Series-B
7. Series-C
8. …
9. Series-Z
10. Venture round
11. Growth round
12. IPO

Also, why isn’t pre-seed called a pollen round?