Any chance of the late addition of an "Extinct" category? (I would consider sponsoring a trilobite. Or a megatherium.)
The
Trilobite suggestion is interesting. It sounds like most of them were "vermin" scale - in the 1 inch to 4 inch range. But some fossils are up to 28 inches long. (And I suppose Toady could fudge the numbers a bit and make an even larger version.)
BTW, there are certain marine species that resemble Trilobites. I think the freakiest of these might be the
Giant isopod family, which consists of 9 species of crustaceans related to the shrimp and crabs:
Wikipedia suggests an adult averages between 7.5 and 14 in, but this "
Terrifying Sea Critter" published on FOXNews shows they can grow to over 2.5 feet long.
Another is the
Triops, which is a genus of small crustaceans. They're called the "living fossil" because fossil records date it to about 300 million years ago and they've hardly changed in the last 200 million years or so. But these are only supposed to grow to 3 inches. A closely related genus is the
Lepidurus. And I could be wrong, but I think this "
Weird Creature" might be one of them. Both of these belong to the order
Notostraca, also referred to as "tadpole shrimp" or "shield shrimp".
One other similar looking critter is the
sea roach or "sea slater", which is a marine crustacean that's closely related to
woodlice (pill bug family), but it doesn't get much longer than an inch.
Also, the
Chitons resembles Trilobites - at least superficially. The largest of these is the
Gumboot Chiton, which can grow to 14 inches. Those are marine mollusks and seem a bit like slugs with
Pillbug-like armor.
Further, I think the
Horseshoe Crab bears a slight resemblance. (This is
already on the
Animal Sponsorship Drive.) But while it looks like a crustacean, it's actually more closely related to spiders and scorpions. And they've changed little in the last 250 million years.
Then, there are a few insects that resemble Trilobites. The
Duliticola Beetle is better known as a "Trilobite Larva". The brief article does not have an image, but a nice photo
can be found here. These are native to South East Asia. The males are much smaller and look like regular beetles because the females stay in the larval form.
Also, the
larva stage of the "wild olive leaf beetle" bears a resemblance. These are common in South Texas.
I would mention the
Woodlice suborder (over 3,000 known species?) here, to which the
Pill Bug family belongs. However, I mentioned them earlier. (Besides, these are terrestrial crustaceans and not insects.)
Finally, how many of you have seen
Enemy Mine (1985)? Remember those big armored bugs that they used for food and shelter? Here's an image of a
Cuca Bug shell prop to jog your memory. Remember how tough those Cuca Bug shells were? They easily deflected meteorites. Perhaps DF could use a critter with shells as hard as steel?