Acrocanthosaurus

Acrocanthosaurus atokensis or ‘the high spined lizard from Atoka County’ named for where it was found and its most distinctive trait, was the largest carnivore in North America when it lived, and remains the fifth largest theropod discovered in North America to date. At a length of about 11.5 meters — a little more than 38 feet — and a weight approaching six metric tons, it was a member of the Carcharodontosauridae although it lacked some of the defining characteristics of more derived Carcharodontosaurs like Carcharodontosaurus or Giganotosaurus. As mentioned, it had a series of extremely tall spines growing out of its back, with muscle attachments that suggest a ridge of muscle possibly anchoring a fatty hump.

Acrocanthosaurus lived between 125 and 100 million years ago, which means no, it could never have met or fought Tyrannosaurus. In fact, the most contemporary Tyrannosaurid we know of from that time period is Dilong paradoxus, which lived about 126 million years ago, or the closely related Eotyrannus lengi, which lived during the Aptian which is the same geological era as Acrocanthosaurus, and which wouldn’t even have come up to the animal’s hip. Basically, at the time this dinosaur lived, it would have eaten any extant Tyrannosaurids in one or two bites. Acrocanthosaurus teeth have been found near the remains of the massive Macronarian Sauroposeidon, suggesting it may have hunted or scavenged from these behemoth relatives of Giraffatitan.

This is the Queue. Here’s hoping y’all talked about dinosaurs this week because I’m super in the mood.