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Dinosaur 2009] Oriental Dragon

Latin name Dinocephalosaurus
The Chinese name of the Dragon
The classification of diapsida early dragon Protorosauria, uncertain times:?
Body length 2.7 m
Weight 25 kg
Era of the three Anisian period
Distribution of Guanling formation (Formation Guanling) in Panxian, Guizhou Province, China
Environmental shallow sea
Named Li, 2003
Orientalis D. is a type of dragon
V IVPP 13767
Described in 2003 and 2004, the Chinese Academy of Sciences, the ancient vertebrate and the ancient human research institute of Li Chun to the world introduced a strange, known as "the engineering mechanics of the nightmare" of the reptile - the Oriental Dragon (orientalis Dinocephalosaurus).
Oriental fear head dragon found in Pan County, Guizhou Province, China Triassic Anisian system order (age stage of the Guanling formation (Guanling formation strata and is the type specimen IVPP V 13767 includes a complete skull and the former three cervical vertebrae. Also included is a description of a near complete skeleton IVPP V 13898. The body length of the Oriental dragon head is about 2.7 meters, and the neck is 1.7 meters; this is because the East fear of the head of twenty-five cervical vertebra, cervical vertebra is long, long, long, the length of the spine is 2.75 times the length of the front part of the spine.
The eastern part of the fear of the head of the cervical spine number relative to the other a long neck of the reptile, such as (such as She Jinglong), for example, the late She Jinglong type thin slice Dragon (Elasmosaurus) has more than seventy cervical spine; and the length is slightly better than the length of a reward (Bo Pianlong's neck length of less than half), so it is very difficult to play, and some people even think that the East may not be able to lift the head of the neck.
Oriental fear dragon head elongated skulls, the maxilla and orbital of the central; no zygomatic process; large parietal and flat, with the parietal foramen; mandibular and maxillary joint posterior articular bone is very small. Oriental dinocephalosaurus is "false teeth different animals", in East fear dragon head of the premaxilla and maxilla margin prominent part respectively has developed the "canine"; from its sharp teeth, we can infer the East fear dragon head is a status of fierce carnivores.
Oriental dinocephalosaurus belongs to Protorosauria (Protorosauria), also called Protorosauria prolacertiformes (Prolacertiformes). Protorosauria mainly found in the upper Permian to Triassic in Europe, North America and other marine strata and recently in Asia near the middle and Western China, also find Protorosauria for the majority of aquatic and semi aquatic animals, a few may for specialized arboreal animals. These special kinds of is about some paleontologists think that birds and pterosaurs.
The original purpose of the Dragon Skull compared to the original does not have the antorbital hole and the outer mandibular foramen, but with parietal foramina; Protorosauria used under the Dragon scales, as Squamata (amphisbaenian, lizards, snakes and other ancestors), because most of the original dragon square is to zygomatic degradation, so the temporal Skull arch incomplete, so only one of the normal temporal hole (temporal hole open), and similar (the lizard lizard zygomatic temporal atrophy, loss of arch; snakes zygomatic and orbital bone is missing, two in temporal bow and eyelet together); but the original dragon. Bone by bone supporting the ventral scales, scales square bone bone joint link structure does not have the lizard; later paleontologists (C. E. Gow) high of Protorosauria not scaly dragons, and should be classified as archosaurs (Gow, 1975); now, most of the ancient life Biologists have Protorosauria as early as the beginning of a dragon shaped subclass, dragon shaped like a sister group.
("Falang formation") in addition to the dinocephalosaurus and a genus called Tanystropheus sp. (Tanystropheus Meyer, the 1855) the original dragon animals also have a long neck, found in Europe and the Middle East in the middle and Late Triassic marine strata (Rieppel, 2001), recently in China's Guizhou Province, Xingyi in Triassic Ladinian (Ladinian stage "Franc group" formation also found the genus of material (Li, 2007); Tanystropheus looks dinocephalosaurus similar, but the body is slightly larger, three to six meters long. Tanystropheus cervical structures and fear of dragon head is very similar, neural spine is degraded, the characteristics in the large PTERODACTYLOID pterosaurs azhdarchids can also see; because of the long necked long cervical ribs are slender, so once BASSANI (Francesco BASSANI) as is the fourth of a pterosaur, named "Three Li tooth dragon" ("Tribelesodon longobardicus" BASSANI, 1886).
Tanystropheus of the cervical spine with age, the neck of the adult Tanystropheus about for more than 60 percent of body length, according to the proportion to dinocephalosaurus slightly shorter than; this is because the number of cervical Tanystropheus is less than that of dinocephalosaurus, past inferred from seven to twelve pieces are. It is generally believed that eleven to twelve gold; but Tanystropheus single pieces of the cervical spine is slightly longer than the dinocephalosaurus.
Although fear of dragons and Tanystropheus looks very similar, and cervical structure is relatively close, but Tanystropheus cervical vertebra amount to less than fear dragon head of 25 pieces; and Tanystropheus posterior cervical length and width of the average ratio greater than dinocephalosaurus two to three times. That is to say the single pieces of cervical spine to than fear the dragon head elongated much. Li Chun, who thinks it is a phenomenon of convergent evolution, that is fear of dragons and Tanystropheus actually belong to different branches, they because of the similarity of the marine environment and some similar (Li et al., 2004).


 
 

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