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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
 
MACROPHALANGIA
Pronunciation: mak-row-fuh-LAN-jee-uh  
Translation: Big Phalanges
Also Known As: Chirostenotes
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Tetanurae
Micro-order: Maniraptora (of the microorder Coelurosauria)
Family: Elmisauridae
Height: 4 feet (1.2 meters)
Length: 7 feet (2.1 meters)
Weight:
Period: Late Cretaceous


Notes: This dinosaur, discovered in Alberta, Canada, was named for its long toes. Also discovered in the same formation was Chirostenotes, and when a partial skeleton was later recovered, it was determined that Chirostenotes and Macrophalangia were the same creature.


MACRUROSAURUS
Pronunciation: mak-ROO-ruh-SAWR-us  
Translation: Long Tailed Lizard
Also Known As:
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Titanosauridae
Height:
Length: 40 feet (12.2 meters)
Weight: Period: Early Cretaceous


Notes: Macrurosaurus was one of the first titanosaurids discovered. It takes its name from the fact that it had more than 40 vertebrae in its tail.


MAIASAURA
Pronunciation: mah-ee-ah-SAWR-uh  
Translation: Good Mother Lizard
Also Known As:
Description: Herbivore, Bipedal, semi Quadrupedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Hadrosauridae
Height: 15 feet (4.6 meters)
Length: 30 feet (9.1 meters)
Weight:
Period: Late Cretaceous





Notes: It was the discovery of a hadrosaur crèche in Montana that provided evidence of nurturing behavior in dinosaurs. Remains of Maiasaura nestlings revealed worn teeth, which suggests that they were fed by their parents until they were able to leave the nest. In addition, broken shells in the bottom of the nests were in such small pieces that the dinosaurs who hatched from them must have stayed to walk and lie on the pieces until they were broken in very small fragments. These facts among others led to a revision of our view of dinosaur behavior.


MAJUNGASAURUS
Pronunciation: mah-JUNG-ah-SAWR-us  
Translation: Majunga Lizard
Also Known As:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Ceratosauria
Family: Abelisauridae (not confirmed)
Height:
Length:
Weight:
Period: Late Cretaceous


Notes: Only fragmentary remains have been found. Majungasaurus takes its name from late Cretaceous rocks in which it was found, in the Majunga Desert of Madagascar.


MAJUNGATHOLUS
Pronunciation: mah-JUNG-ah-tho-lus  
Translation: Majunga Dome
Also Known As:
Description: Herbivore, Bipedal
Order: Ornithischia
Suborder: Marginocephalia
Infraorder: Pachycephalosauria
Family: Pachycephalosauridae
Height: 7 feet (2.1 meters)
Length: 9.8 feet (3 meters)
Weight: Period: Late Cretaceous


Notes: Found in Madagascar, Majungatholus is known only from part of a skull, which was dome-like and rimmed by knobs and grooves.


MALAWISAURUS
Pronunciation: ma-LAHW-wee-SAWR-us  
Translation: Malawi Lizard
Also Known As: Gigantosaurus dixeyi, Tornieria dixeyi
Description: Herbivore,Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Titanosauridae
Height: 14 feet (4.3 meters)
Length: 30 feet (9.1 meters)
Weight: 24,030 pounds (10,900 kg)
Period: Early Cretaceous


Notes: Malawisaurus takes its name from the place of its discovery, Malawi, Africa. Discovered by Dr. Louis Jacobs, Malawisaurus closely resembles Andesaurus from South America. Its discovery provided a missing link in the evolutionary story of titanosaurids. It is the only Titanosaurid for which skull material (but not a whole skull) is known.


MALEEVOSAURUS
Pronunciation: MAH-lee-av-vuh-SAWR-us  
Translation: Maleev (Eugene Alexandrovich) Lizard
Also known as: Gorgosaurus novojilovi
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Tetanurae
Micro-order: Carnosauria
Family: Tyrannosauridae
Height:
Length:
Weight:
Period: Late Cretaceous


Notes: First thought to be a juvenile Tyrannosaurus, Maleevosaurus is now considered to be a distinct genus. It had tall spines on its neck vertebrae, which would have given it an appearance different from that of other tyrannosaurids.


MAMENCHISAURUS
Pronunciation: mah-MEN-chih-SAWR-us  
Translation: Mamenchi (China) Lizard
Also Known As:
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Euhelopodidae
Height: 35 feet (10.7 meters)
Length: Total length 69 feet (21 meters);
Neck 36 feet (11 meters)
Weight: 60,000 pounds (27,216 kg)
Period: Late Jurassic


Notes: Mamenchisaurus, the largest known dinosaur from Asia, has the longest known neck of any dinosaur, measuring up to 36 feet and containing 19 vertebrae. The vertebrae are similar to those found in Omeisaurus and Tienshanosaurus but it's limb, foot and ankle bones resemble Apatosaurus resulting in its classification as a diplodocid. It was thought to be related to Diplodocus, but its skull, recently discovered, resembles that of Euhelopus. Further studies have determined that members of this genus, as well as other Chinese sauropods from this time, such as Euhelopus, share enough unique characteristics to constitute a separate sauropod family Euhelopodidae.


MANDSCHUROSAURUS
Pronunciation: mand-CHUR-uh-SAWR-us  
Translation: Manchurian Lizard
Also Known As: Gilmoreosaurus
Description: Herbivore, Bipedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Hadrosauridae (not confirmed)
Height: 16 feet (4.9 meters)
Length: 26 feet (8 meters)
Weight:
Period: Late Cretaceous


Notes: Discovered in 1914, Mandschurosaurus was the first Chinese dinosaur to be named. It was large duck-billed dinosaur.


MARSHOSAURUS
Pronunciation: MARSH-uh-SAWR-us  
Translation: Marsh's Lizard
Also Known As:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Family: Height: 8 feet (2.4 meters)
Length: 17 feet 5.2 meters)
Weight: 1,000 pounds (450 kg)
Period: Late Jurassic


Notes: Found in Utah and Colorado, Marshosaurus was named in honor of Othniel Charles Marsh. Because of its fragmentary remains, the family of Marshosaurus is open to debate.


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