MACROPHALANGIA
MACRUROSAURUS
MAIASAURA
MAJUNGASAURUS
MAJUNGATHOLUS
MALAWISAURUS
MALEEVOSAURUS
MAMENCHISAURUS
MANDSCHUROSAURUS
MARSHOSAURUS
MASSOSPONDYLUS
MEGALOSAURUS
MELANOROSAURUS
METRIACANTHOSAURUS
MICROCERATOPS
MICROPACHY-
CEPHALOSAURUS
MICROVENATOR
MINMI
MONGOLOSAURUS
MONKONOSAURUS
MONOCLONIUS
MONONYKUS
MONTANOCERATOPS
MUSSAURUS
MUTTABURRASAURUS
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MONOCLONIUS
Pronunciation: mon-uh-CLO-nee-us 
Translation: Single Stem, or One Horned
Also Known As:
Description: Herbivore,y Quadrupedal
Order: Ornithischia
Suborder: Marginocephalia
Infraorder: Ceratopsia
Micro-order Neoceratopsia
Family: Ceratopsidae
Height: 9 feet (2.7 meters)
Length: Total 20 feet (6.1 meters)
Head: 6 feet (1.8 meters)
Weight: Period: Late Cretaceous
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Notes: Found in Alberta, Canada and in Montana, Monoclonius
had a massive head with a large nose spike.
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MONONYKUS
Pronunciation: mo-NON-ih-kus
Translation: One Claw
Also Known As:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Tetanurae
Micro-order: Maniraptora (of the microorder Coelurosauria)
Family:
Height: 3.5 feet (1.1meters)
Length: 5 feet (1.5meters)
Weight:
Period: Late Cretaceous
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Notes: Mononykus is known from fragmentary remains
discovered in Mongolia. It had a large but short forelimb
with a single claw. While not capable of flight, Mononychus
may be more closely related to modern-day birds than is
Archaeopteryx.
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MONTANOCERATOPS
Pronunciation: mon-TAN-uh-SAIR-uh-tops
Translation: Horned Face of Montana
Also Known As:
Description: Herbivore, Quadrupedal
Order: Ornithischia
Suborder: Marginocephalia
Infraorder: Ceratopsia
Micro-order Neoceratopsia
Family: Protoceratopsidae
Height: 2.5 feet (0.8 meters)
Length: 6 feet (1.8 meters)
Weight:
Period: Late Cretaceous
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Notes: Found in Montana, Montanaceratops is known for its
parrot-like beak and prominent nose horn. It is perhaps the
most well-developed protoceratopsian.
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MUSSAURUS
Pronunciation: moose-SAWR-us
Translation: Mouse Lizard
Also Known As:
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Prosauropoda
Family: Plateosauridae
Height: 10 feet (3 meters)
Length: 26 feet (7.9 meters)
Weight: 4,000 pounds (1,814 kg)
Period: Late Triassic
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Notes: With the discovery in southern Argentina of adults and
young hatchlings, Mussaurus is the earliest known dinosaur baby
and the eggshells represent the oldest known dinosaur eggs.
While no whole eggs have been discovered, only eggshells in
the vicinity of the Mussaurus hatchlings, the eggshells are
presumed to belong to Mussaurus. A plateosaurid prosauropod
like Coloradisaurus, they represent the only South American
prosauropods; other South American prosauropods are all
members of Melanorosauride.
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MUTTABURRASAURUS
Pronunciation: mut-tah-BUR-rah-SAWR-us
Translation: Muttaburra Lizard
Also Known As:
Description:
Herbivore, Bipedal ,semi Quadrupedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Iguanodoutidae
Height: 15 feet (4.6 meters)
Length: 23 feet (7 meters)
Weight:
Period: Early Cretaceous
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Notes: Found in Australia, Muttaburrasaurus had a broad low-head
and hoof-like hands with a large flattened thumb spike. Its teeth
may have worked like shears, unlike those of other iguanodontids,
and some take this shearing ability to mean that Muttaburrasaurus
may have been partially carnivorous.
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