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Dinosaur of the Day


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#16    Pilgrim_Shadow

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Posted 24 April 2006 - 10:43 AM

Coelophysis
Coelophysis Bauri

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Pronounced: see-low-FI-sis
Diet: Carnivore (meat-eater)
Name Means: "Hollow Form"
Length: 10 ft (3m)
Height: 4 ft (1.3m)
Weight: 66 pounds (30 kg)
Time: Late Triassic - 220 MYA
Location: North America

Coelophysis is a well-known, very early theropod dinosaur. It was approximately the same size as a wolf yet weighed less than a hundred pounds. This is because coelophysis had very light, hollow bones, from which it derives its name. Two distinct forms have been found - "robust" and "gracile" - which scientists believe represent males and females.

The slender build and long legs of coelophysis imply that it was a swift runner. It had keen eyesight and long, grasping limbs for catching quick-moving prey. It appears to have fed mainly on insects, mammals, and small lizards.

Fossils of coelophysis have been found with the bones of juveniles and hatchlings in their abdomen. At first it was believed that these represented unborn young. However, the level of development suggests that this was not the case. Coelophysis was a cannibal and may have eaten any small animal it could catch - including its own offspring.

-Pilgrim

"Shadow," said he,
"Where can it be,
This land of Eldorado?"

"Over the mountains
Of the moon,
Down the valley of the Shadow,
Ride, boldly ride!"
The shade replied,
"If you seek for Eldorado!"

#17    frogfish

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Posted 25 April 2006 - 01:42 AM

Cryolophosaurus
Cryolophosaurus elliotti
  
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Pronounced: Cry-o-Lof-o-Saw-rus
Diet: Carnivore(Meat-eater)
Name Means: "Frozen Crested Lizard"
Length: 20 ft. (6 m)
Height: 7 ft. (2 m)
Weight: unknown
Time: Early Jurassic - 190 MYA
Location: Antarctica  

  
  Cryolophosaurus is the first meat-eating dinosaur to be discovered on the frozen continent of Antarctica. It was an odd looking dinosaur, fairly large for such an early hunter. It had a very unusual crest, sort of a single horn without a point. It is an important discovery not only because of where it was found, but also because it shows features found on both early, less advance meat-eaters and later more advanced meat-eaters such as Allosaurus. When this dinosaur was roaming around on Antarctica, that island continent was a part of Pangaea and attached to Africa, South America and Australia in a much warmer part of the world.

It is possible that Cryolophosaurus will be assigned to the ceratosaur family once further study is concluded. Little is known of this dinosaur due in part to the inhospitable environment where its remains were discovered. It is likely an important piece of the puzzle for theropod evolution, bridging both primitive and more advanced features.



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#18    Pilgrim_Shadow

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Posted 25 April 2006 - 11:39 AM

Troodon
Troodon Formosus

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Pronounced: True-don
Diet: Carnivore (meat-eater)
Name Means: "Tooth That Wounds"
Length: 6 feet (1.8m)
Height: 2 feet (.7m)
Weight: 110 pounds (50 kg)
Time: Late Cretaceous - 67 MYA
Location: North America

A comparison of brain mass to body mass shows that troodon may very well be the smartest dinosaur to ever live. It was a descendant of the raptors and shared their sickle-shaped toe claws. Like raptors, it was swift, highly intelligent, and probably social. Paleontologists believe it had feathers.

Troodon fossils were discovered as early as 1855, however, they were fragmentary and originally attributed to numerous other species. It wasn't until a nearly complete skeleton was found that the true nature of the animal became apparent. Some 20 different specimens have been found to date, including a rare egg with a fossilized embryo inside.

-Pilgrim

"Shadow," said he,
"Where can it be,
This land of Eldorado?"

"Over the mountains
Of the moon,
Down the valley of the Shadow,
Ride, boldly ride!"
The shade replied,
"If you seek for Eldorado!"

#19    frogfish

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Posted 25 April 2006 - 03:25 PM

Liliensternus
Liliensternus liliensterni
  
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Pronounced: Lil-ee-an-Stern-us
Diet: Carnivore (Meat-Eater)
Name Means: "Lilienstern's"
Length: 20 feet (6 m)
Height: 8 feet (2.5 m)
Weight: 880 pounds (400 kilos)
Time: Late Triassic - 215 MYA
Location: Central Europe  
  
  Liliensternus was a very early large meat-eater that was likely one of the first dinosaurs. It is difficult to determine what it looked like as not much of this dinosaur has been found. Liliensternus gets its name from Hugo Rule von Lilienstern, a German scientist.

Originally referred to as Halticosaurus when it was first discovered in 1934, it was later renamed in 1984 after further study. Liliensternus was a lightly built dinosaur, typical of the early carnivores. A partial specimen found in 1993 seems to fall on the Triassic/Jurassic boundary, which could make this an important transitional species. To date, all of the specimens that have been found appear to be sub-adults; so much of our knowledge is incomplete.



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#20    SG7

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Posted 26 April 2006 - 11:58 AM

[attachmentid=25228]
  
  
Megaraptor
Megaraptor namunhuaiquii
  
Pronounced:Meg - uh - Rap - tor
Diet:Carnivore (Meat-Eater)
Name Means:"Big Robber"
Length:26 feet (8 m)
Height:10 feet (3 m)
Weight:1 tons (900 kilos)
Time:Middle Cretaceous - 90 MYA
  
  
Fact Card: Download a flash card to cut out and quiz your friends  

    
Location:South America, possibly Asia  



  
  If this monster was everything scientists think it was, it could have been the most vicious predator ever. Megaraptor was like a giant Velociraptor, larger even than Utahraptor, that had a killing claw over 14 inches (36 cm) long! Add to that its sharp teeth, long powerful arms and hands with huge claws and you have one fierce animal. The trouble is, very little of this dinosaur has been found, and it is a very recent discovery, so it may be some time before we know for certain what it really looked like.

Discovered in 1997 in Argentina, Megaraptor was found associated with the fossil remains of Unenlagia, a bird-like dinosaur. There is some speculation that Megaraptor was the adult version of Unenlagia, which is known from an apparently juvenile specimen. Remains of a specimen similar to those of the Megaraptor have also recently been found in China and await study.
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Ha if it lived in both South Am. and asia it "mite" have lived in north Am. It "mite" have cross that in to alska. geek.gif

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Edited by SG7, 26 April 2006 - 12:03 PM.

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#21    Pilgrim_Shadow

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Posted 26 April 2006 - 04:48 PM

Quote


Ha if it lived in both South Am. and asia it "mite" have lived in north Am. It "mite" have cross that in to alska. geek.gif


During the Middle Cretaceous, South America was an island, and North America and Asia were on opposite sides of the earth. Thus, I strongly doubt that Megaraptor lived in both continents. Also, Megaraptor is now known to be a carnosaur (relative of Allosaurus) rather than a dromaeosaur.

-Pilgrim

"Shadow," said he,
"Where can it be,
This land of Eldorado?"

"Over the mountains
Of the moon,
Down the valley of the Shadow,
Ride, boldly ride!"
The shade replied,
"If you seek for Eldorado!"

#22    SG7

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Posted 26 April 2006 - 11:04 PM

Quote


During the Middle Cretaceous, South America was an island, and North America and Asia were on opposite sides of the earth. Thus, I strongly doubt that Megaraptor lived in both continents. Also, Megaraptor is now known to be a carnosaur (relative of Allosaurus) rather than a dromaeosaur.

-Pilgrim

So its not a raptor.

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#23    frogfish

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Posted 26 April 2006 - 11:11 PM

There was correlation between Oviraptor (Mongolia) and a giant Oviraptorid which lived in N. America...

Mamenchisaurus
Mamenchisaurus constructus
  
user posted image
  
Pronounced: mah-Men-key-Saw-rus
Diet: Herbivore (Plant-Eater)
Name Means: "mamenxi lizard"
Length: 82 feet (25 m)
Height: 25 feet (8 m)
Weight: 18 tons (16,000 kilos)
Time: Jurassic
Location: China, Mongolia  

  Mamenchisaurus is one of the most unique long-necked dinosaurs for a very good reason - it has a really long neck. In fact, it has the longest neck of any creature that ever lived. Stretching 46 feet (15 m), the neck on Mamenchisaurus was longer than a school bus! The rest of it was just like other members of its family; a long tail, stout legs and really big.

The architecture of the neck of this dinosaur is incredible. It had 19 neck vertebrae, more than any other dinosaur. The vertebrae had long struts running between them that would have limited the ability of Mamenchisaurus to turn its neck too sharply, but it could still reach well up into the trees to feed. This plant-eater had spatula-shaped teeth that seem to have been well designed to chew coarse plant material. This is one feature that makes it different from the members of the Diplodocidae family, which had peg shaped teeth, to which it has been thought to belong. It is now being thought of as possibly part of a group of sauropods unique to Asia. Most of the big Asian sauropods, such as Omeisaurus, had spatulate teeth. In fact, the Asian sauropods, including Mamenchisaurus, seem to share more characteristics with Brachiosaurus than with Diploducus. For evidence of this, one needs to look no further than the nose - Mamenchisaurus and other Asian sauropods are very close in evolutionary terms to that of Brachiosaurus. It is also thought that another aspect that these creatures had in common was that they were finding their food high off the ground. Diploducus and Apatosaurus on the other hand were likely feeding on low growing plants.

Note: Many people don't realize that China is one of the most prolific areas for the discovery of dinosaurs. The Sichuan Province is perhaps the best place in the world to find Jurassic dinosaurs.



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#24    SG7

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Posted 26 April 2006 - 11:48 PM

Whats the defints beteewn Tyrannosaurus bataar and Tyrannosaurus? They both lived in North Am. and asia. I can't tell the defints.


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#25    Pilgrim_Shadow

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Posted 27 April 2006 - 01:15 AM

Quote


So its not a raptor.


No, it is not. This is not the only dinosaur to be so confused. Baryonyx was once believed to be a dromaeosaur. It stems from largely incomplete fossils and a confusion of dromaeosaur toe claws with the hand claws from a larger theropod. It just goes to show that in the case of largely fragmented finds it can take a great deal of study to determine the identity of the creature.

Quote


Whats the defints beteewn Tyrannosaurus bataar and Tyrannosaurus? They both lived in North Am. and asia. I can't tell the defints.


By Tyranosaurus I assume you mean Tyranosaurus Rex. Tyranosaurus is the genus; Rex is the species. Thus, the difference between T. Rex and T. Bataar would be the same as the difference between a lion and a tiger, or between a black bear and a brown bear.

-Pilgrim

"Shadow," said he,
"Where can it be,
This land of Eldorado?"

"Over the mountains
Of the moon,
Down the valley of the Shadow,
Ride, boldly ride!"
The shade replied,
"If you seek for Eldorado!"

#26    frogfish

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Posted 27 April 2006 - 02:06 AM

Tyrannosaurus Bataar was also once known as Tarbosaurus thumbsup.gif

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#27    frogfish

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Posted 28 April 2006 - 02:16 AM

Eustreptospondylus
Eustreptospondylus oxoniensis
  
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Pronounced: u-Strep-toe-spon-Di-lus
Diet: Carnivore (Meat-Eater)
Name Means: "Well Reversed Spine"
Length: 25 - 30 feet (7 - 9 m)
Height: 10 - 14 feet (3 - 4.5 m)
Weight: 1 - 2 tons(900 - 1,800 kilos)
Time: Jurassic
Location: Northern Europe  
  
  This was a curious carnivore (meat-eater) from the Jurassic Period. The only fossils of it that scientists have to study are those of a teenage version of the dinosaur. It is one of those dinosaurs that there is just enough of the fossil to get a pretty good idea of what it looked like, but enough is missing to keep the experts guessing as to its exact look.

It is possible that it is related to the Allosaurus or Megalosaurus because it had similar characteristics, but it currently still occupies its own genus. The original specimens, described in 1841 by Richard Owen, have been lost so there is nothing with which to compare it. Specimens found in northern France are also possibly members of the genus, but have yet to be positively identified. The type specimen was a sub-adult and as such further hinders the classification efforts.



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#28    SG7

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Posted 29 April 2006 - 02:40 PM

[attachmentid=25335]

Saurornitholestes
Saurornitholestes langstoni
  
Pronounced:sore-Orn-ith-oh-less-tees
Diet:Carnivore (Meat-Eater)
Name Means:"Lizard Bird Robber"
Length:6 feet (2 m)
Height:2 feet (.7 m)
Weight:50 pounds (21 kilos)
Time:Late Cretaceous - 76 MYA
  
  
Fact Card: Download a flash card to cut out and quiz your friends  

    
Location:North America  



  
  Saurornitholestes was a small but fierce hunter and a member of the raptor family of dinosaurs that includes the famous Velociraptor. In fact, some scientists think that Saurornitholestes may actually be a Velociraptor. Unfortunately, not enough of its skeleton has been found to make any absolute decisions.

The partial skull fragments of Saurornitholestes seem to indicate an extremely close relationship with Velociraptor, but its body remains, which are very incomplete, more closely resemble Deinonychus. An interesting discovery was made of a Saurornitholestes tooth imbedded in a pterosaur bone. The pterosaur was a fairly large individual so scientists believe the smaller dinosaur most likely scavenged the carcass. At the time of its discovery, this was the first reported fossil bone discovered with a predator's tooth actually preserved in it.  

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#29    SG7

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Posted 29 April 2006 - 05:48 PM


Ha forgfish whare is this place. I thart you would know.

[attachmentid=25365]


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#30    SG7

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Posted 30 April 2006 - 02:54 PM

[attachmentid=25392]


Rapator
Rapator ornitholestoides
  
  
Pronounced:Rap-ah-tore
Diet:Carnivore (Meat-Eater)
Name Means:"One Who Raids"
Length:26 feet (8 m)
Height:12 feet ( 3.8 m)
Weight:1 ton (450 kilos)
Time:Early Cretaceous - 110 mya
  
  
Fact Card: Download a flash card to cut out and quiz your friends  

    
Location:Australia  



  
  Rapator was a large meat-eater from Australia - maybe. To date, only one hand bone has been found, but it is enough for scientists to determine the basic type of dinosaur from which the bone came. This is a good example of how a little clue can provide a lot of information. Rapator was probably about as large as Allosaurus, but it isn't known if they were related.

Australia is not known for its dinosaur discoveries, so Rapator represents a rare and interesting bit of prehistory. It has been suggested that Rapator was a large ornitholestid, a carnosaur, or even a very large bird-like dinosaur. Some have envisioned this creature as feathered and belonging to the alvarezsauria

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