Another Burgess Shale beastie.
12 to 16 inches, but wasn’t Anomalocaris an even bigger predator?
It was, but since there are few known creatures from this time period, and even fewer that were this big, they can still say it was one of the largest (known).
Also, this thing bears more than a small resemblance to Anomalocaris as well, note the appendages under the head, near the (presumed) location of the mouth.
If you haven’t yet seen it, the BBC “Walking with...” series has one episode called “Walking with monsters” that looks at the Cambrian period, including Anomalocaris, along with the Carboniferous period, and the advent of the “mammal-like” reptiles like Dimetrodon and Diictodont. It’s well worth it, even though the producers took some liberties with the animals in the area of behaviors (since we have no idea what they really did). I would have liked to see some of the other Burgess creatures like Wiwaxia and Hallucinogenia
You are the correct one