Allosaurus fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphans, several species of pterosaur, numerous dinosaur species, and early mammals such as docodonts, multituberculates, symmetrodonts, and triconodonts. Dinosaurs known from the Morrison include the theropods "Ceratosaurus", "Ornitholestes", "Tanycolagreus", and "Torvosaurus", the sauropods "Haplocanthosaurus", "Camarasaurus", "Cathetosaurus", "Brachiosaurus", "Suuwassea", "Apatosaurus", "Brontosaurus", "Barosaurus", "Diplodocus", "Supersaurus", and "Amphicoelias", and the ornithischians "Camptosaurus", "Dryosaurus", and "Stegosaurus". "Allosaurus" is commonly found at the same sites as "Apatosaurus", "Camarasaurus", "Diplodocus", and "Stegosaurus". The Late Jurassic formations of Portugal where "Allosaurus" is present are interpreted as having been similar to the Morrison but with a stronger marine influence.
Formerly Known Campbell, Thi'sl, Eshon Burgundy, Sho Baraka, Swoope, Rich Perez, and R-Swift, as well as a comic appearance of professional golfer Bubba Watson. Production was provided by Mineo himself along with Skrip, Alex Medina, and other, uncredited producers such as Tyshane. "Formerly Known" was received positively by critics. Michael Wildes of "The Christian Manifesto" scored the mixtape four-point-five out of five and called it "one of the best albums" of the year. Jerome Hill of "Jam the Hype Radio" was also favorable to the album, stating that "Andy Mineo keeps us flowing with this project with sounds like 'whoop,' showing us