I came across a link on Twitter that was retweeted by one of the writers on the new Thundercats show currently airing on Cartoon Network. The link pointed a tumblr page with an image of different species from Third Earth, the planet, on which, the series takes place.
The text of the tweet I followed was:

This probably shouldn’t have been released, but it’s on this guy’s Tumblr, soooooo – species of Third Earth: skullgrin140.tumblr.com/post/830086461