Coria & Salgado, 1995
Cretaceous Late Turonian
Saurischia Theropoda Tetanurae Carnosauria Carcharodontosauridae
Rio Limay Formation, Provincia de Neuquen, Argentina
Genus - Typespecies - Skull
(12.5 m, 4.16 tons) (skull- ~1.8 m) premaxilla, maxilla, nasal,
lacrimal, postorbital, quadrate, braincase, anterior dentary, teeth,
most cervical vertebrae (including axis and eighth cervical), most
dorsal vertebrae, dorsal ribs, first caudal vertebra, caudal vertebrae
7-21, two distal caudal vertebrae, eight chevrons, scapula (727 mm),
coracoid, ilium (1.54 m), pubes (1.11 m), ischia (1.2 m), femora (1.43
m), tibia (1.12 m), fibula, metatarsi, pedal elements (Calvo and
Salgado, 1996) (MUCPv-95) (13.5 m, 5.2 tons) (skull ~1.95 m) incomplete
dentary, teeth (Calvo and Coria , 2000) The dentary is from a larger
individual than the already huge type, often said to be the largest
was 42 foot-long and weigthed 6 to 8 tons predator. The first bones on
the new king of the prehistoric beasts, which lived 90 million years
ago, were found in 1993 by an amateur fossil hunter, Reuben Carolini.
Its skull, backbone, pelvis and leg bones were subsequently excavated
by two Argentine paleontologists, who described the find in the report.
The report says the predator is the "largest
therapod ever recorded from the Southern Hemisphere and is probably the
world's biggest predatory dinosaur.".The skull alone was more than 1.53
metres (five feet) long.The teeth of Giganotosaurus are
typical theropod teeth. The tibia/femur ratio scales along the same
curve as the typical nonavian theropods: i.e., it follows the
Allosauroid trend. Living as it did in a sauropod-dominated
environment, it wouldn't need the elongated limbs of tyrannosaurids.
The tibia/femur ratio of typical neoceratosaurs, "megalosaur-grade" and
allosauroid theropods is greater than 1.0. Giganotosaurus also had huge
olfactory bones, indicating a keen sense of smell that it most likely
relied on the greatest.