Text updated. Further examination desired.
The part about its discovery should be put in an addendum so the narrative is the right way around.
The existing addendum should be a quote, put "> " at the beginning of it (space needed) (no quotation marks).
Make these changes wait for some more reviews and we will see how this pans out.
Creatures of Earth's past are still a part of its natural history. On the other hand, a species from an evolutionary line that never happened would not exist. So: If you bagged a smilodon or a woolly mammoth, you could bring it out. On the other hand, a more extremely adapted version of C. Homonivora (a real insect also known as the Primary Screwfly) would be a problem. The primary screwfly lays larva in other creature's tissues. Hence the thing about the D-Class.
A very good spatially altering skip, this is essentially a finished product. No grammatical or story errors, although I did notice a couple tonal mishaps, i.e.; use of the word "garb".
Also, if you wanted to be more mysterious, you could alter "fungal, bacterial, protozoan and [DATA EXPUNGED] life forms." to be "fungal, bacterial, protozoan and even [DATA EXPUNGED] life forms.", which adds a little suspense.
The addendum adds a lot to it as well. It would not be the same without it. (my favorite part.)
Good job, I look forward to seeing it on the site.