Feels like a similar approach to Purna matsyendrasana, Pasasana and Marichiyasana H, all in the preparation or set up.
Not suggesting this is a perfect Mari, sure my shoulders should be more level, buttock higher or lower, foot further forward or back or in or out, whatever, it kinda works.
Marichiyasana D : Primary Series
Pashasana / Pasasana ( from March 2009 ) : Intermediate Series
Purna Matsyendrasana : Advanced A
Marichiyasana H : Advanced B