Medium: acrylics on card
c.95 million years ago, Ein Yabrub, Israel.
Pachyrhachis problematicus is one of the oldest known snakes. It was a metre long seafaring reptile that, unlike its modern cousins, had small but fully formed hind-limbs, remnants of it's fully-limbed, terrestrial ancestry.
This image originally appeared in Nature Australia, Summer 2001-2002 (Australian Museum)