How many distinct enough bioregions does India have?

We’re trying to understand ecosystems from a ecology-economy perspective, and wondering what detail/granularity would be useful. We have heard from various sources about the existence of the number of distinct bioregions in India being in the upper tens, and upto the upper hundreds!

Would love to have responses and references for this.

To set the ball rolling, Wikipedia lists these: https://en.wikipedia.org/wiki/List_of_ecoregions_in_India