A dinosaur that once towered over Frieze London as a $20 million juvenile Tyrannosaurus rex is going back on the block with a new name, a new species and a lower price. The skeleton, previously billed as Chomper, has been reclassified as a Nanotyrannus — a distinct, fast, highly specialized predator — and renamed Jodi. It will be offered in a dedicated sale at Sotheby's New York on October 27 with an estimate of $6 million to $9 million. The rebrand settles a century-old debate over whether small T. rex-like skeletons were juveniles of the species or a separate genus. A study published in Nature last October, based on 200 tyrannosaur fossils examined by scientists at the North Carolina Museum of Natural Sciences, formally introduced Nanotyrannus and laid out 150 morphological differences from its larger cousin. The specimen was discovered in 2019 in Montana's Hell Creek Formation by Jodi Pierson, its namesake, and excavated by her cousin, commercial paleontologist Clayton Phipps, in a dig filmed for the Discovery Channel series Dino Hunters. Jodi is a formidable fossil in its own right: taller than the average human and nearly 20 feet long, with all four claws, 35 teeth set in a virtually complete skull, and an intact pelvis, thighbone and collarbone; earlier assessments put the skeleton at about 55 percent complete. Cassandra Hatton, Sotheby's head of science and natural history, said the specimen shows how paleontology keeps revising itself. The price drop reflects cultural cachet more than science: few dinosaurs command the aura of a T. rex. Hatton noted that a comparatively small theropod is also simply more manageable for a collector to house. Dinosaur fossils are now an established auction category. In July, a nearly complete T. rex named Gus sold at Sotheby's for $50.1 million, above a $30 million high estimate, topping the $44 million Ken Griffin paid in 2024 for the stegosaurus Apex. Between those sales, a juvenile Ceratosaurus brought $30.5 million, more than five times its high estimate. Jodi's result on October 27 will test whether buyer appetite extends to a newly minted genus.