I found the name. It's called Vishwamitrasana and it's exactly what yoga is all about.
BTW, I though it was 84 million postures that correspond to the pattern of sitting of different species, 8.4 million actual asanas, 84 are important and then from that every style of yoga has their own idea of how many are essential (seems to vary a lot).
Funny how yoga wasn't about achieving poses but it's kind of gone that direction. It's like we're going about it backwards. I think you would enjoy this article:
the meaning and purpose of yoga I especially loved this part "The most important teaching of yoga has to do with our nature as human beings. It states that our "true nature" goes far beyond the limits of the human mind and personality--that instead, our human potential is infinite and transcends our individual minds and our sense of self."