Old Earth Ministries Online Dinosaur Curriculum
Free online curriculum for homeschools and private schools
From Old Earth Ministries (We Believe in an Old Earth...and God!)
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Lesson 27 - Gallimimus
Gallimimus (meaning "chicken or rooster mimic") is a genus of ornithomimid dinosaur from the late Cretaceous period (Maastrichtian stage) Nemegt Formation of Mongolia. With individuals as long as 8 metres (26 ft), it was one of the largest ornithomimosaurs. Gallimimus is known from multiple individuals, ranging from juvenile (about 0.5 metres tall at the hip) to adult (about 2 metres tall at the hip).
remains of this dinosaur were discovered in the early 1970s in the
Desert of Mongolia. In 1972, it was named by
Halszka Osmólska, and
Ewa Roniewicz. The only known species is
Gallimimus bullatus. A supposed second species,
has never been formally referred to this genus. A recent reanalysis of the
nearly complete skeleton of Gallimimus
mongoliensis concluded that it is not a species
of Gallimimus but
may represent a new, currently unnamed ornithomimid genus.
Gallimimus was rather ostrich-like, with a small head, large eyes, a long neck, short arms, long legs, and a long tail. A diagnostic character of Gallimimus is a distinctly short 'hand' relative to the humerus length, when compared to other ornithomimids.
Length: 26 Ft
Height: 6.5 Ft (at hips)
Weight: 500 lbs
Date Range: 70 Ma, Maastrichtian Age, Cretaceous Period
|Mounted skeleton, Natural History Museum, London (Picture Source)|
The tail was used as a counter-balance. The eyes were located on the sides of its head, meaning that it did not possess binocular vision. Like most modern birds, it had hollow bones. Gallimimus had a number of adaptations which suggest good running ability, such as long limbs, a long tibia and metatarsus and short toes, but it is unknown how fast it could run.Beak and Paleoecology
The feeding habits of ornithomimids have been controversial.
In 2001 Norell et al. reported a specimen of Gallimimus (IGM 100/1133): a skull with soft
One later paper questioned the conclusions of Norell et al. Barrett (2005) noted that vertical ridges are seen on the inner surface of the beaks of strictly herbivorous turtles, and also the hadrosaurid Edmontosaurus. Barrett also offered calculations, estimating how much energy could be derived from filter feeding and the probable energy needs of an animal as big as Gallimimus. He concluded that herbivory was more likely.
In popular culture
Gallimimus appeared in the motion picture Jurassic Park. A flock was seen running across a vast field from a Tyrannosaurus, which attacked and killed one of the ornithomimids. Gallimimus is also featured in the film's first sequel, The Lost World: Jurassic Park, during the 'roundup' sequence.
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Bay State Replicas - Skull, Arm, Hand, Food, Arm and Hand