Extinct Creatures have been appearing. So far, I have seen the Eastern Elk, Velociraptor, Dodo and Labrador Duck. There may be more. I haven't found a checklist at the Topps site. The various checklists that are floating around seem to be incomplete and do not have this subset.
Now, how to score them? I haven't yet made a final ruling, since I just found out about them today, but I'm inclined to put them at about a +9 or so. This is not yet official.
Stay tuned for more information. I may need to appoint a deputy commissioner to assist me in my duties.
(image lifted from an ebay auction)