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MICRORAPTOR

a small microraptorian theropod dinosaur from the Early Cretaceous of China.
Microraptor
Pronunciation: MIEK-ro-RAP-tor
Meaning: Tiny plunderer
Author/s: Xu, Zhou and Wang (2000)
Synonyms: Cryptovolans pauli (Czerkas, 2002)
First Discovery: Liaoning Province, China
Chart Position: 390

Microraptor zhaoianus

The first remains of Microraptor came from Liaoning Province and formed the "dromaeosaur" part of Archaeoraptor liaoningensis — an infamous multi-part hoax, including glued-together bits of at least two birds — that was smuggled illegally out of China and named unofficially by Chris Sloan in 1998. Soon after, this dinosaur and everyone associated with it were chastised by seething Smithsonian ornithologist Storrs Olsen who took umbrage with it being labelled a "missing link" to his beloved birds, so he cemented the name Archaeoraptor himself, based on the part least likely to be one. If he hadn't chosen a museum newsletter in which to "officially" publish this name, been less dismissive of the evidence linking birds to dinosaurs, or actually made an effort to describe its remains, paleontologists may have taken him more seriously. However, he had, wasn't and didn't, so they didn't either, and Xu Xing later renamed this specimen Microraptor, which has found global acceptance.

Microraptor was slight of build, fully-feathered and sported four wings — one on each of its arms and legs — but it wasn't a bird, and may not have been able to fly like one. Some paleontologists reckon the position of its shoulder joint prevented the upper arm from being raised above the back, hampering the full stroke required for flapping flight. And a suggested biplane-like posture with outstretched leg "wings" positioned at a lower level would be impossible without dislocating its thighs at the hip. Instead, they think, Microraptor probably hoisted themselves into trees with their long claws and glided to a second destination in a u-shaped curve by swan-diving off with legs in an orthodox vertical position beneath the body, then used their hind "wings" and broad-feathered tail for lift and balance. But that is merely one of the many theories. Other experts are adamant that Microraptor had acquired the full set of prerequisites for full, flap-powered flight.

Regardless of their mode of airborne transit, what seems clear is that the feathered legs of Microraptor would have hampered its movement on the ground, so it was likely arboreal — it lived in trees. Based on gut contents from several specimens — including fragments of small lizards and tree-perching birds — these "small plunderers" were long thought to be pure carnivores who ate whatever critters lived in the canopies. However, fossilized fish scales were found within the largest known specimen of Microraptor, which suggests they hunted, or maybe scavenged, fish too.
(Zhao's Little Plunderer)Etymology
Microraptor is derived from the Greek "mikros" (small) and the Latin "raptor" (plunderer or thief). The species epithet, zhaoianus (JOW-ee-AY-nus), honors Chinese paleontologist Zhao Xijin.
Discovery
The first fossils of Microraptor were discovered in the Jiufotang Formation of Liaoning, China, which is embarrassingly rich in fossilized remains of birds, bird-like dinosaurs and flying pteradactyls, but lacking much of anything else.
The holotype (IVPP V 12330) consists of partial skull, hind and forelimbs, various vertebrae, bits of pelvis, slab-feather impressions, and other odds and sods.
Estimations
Timeline:
Era: Mesozoic
Epoch: Early Cretaceous
Stage: Aptian
Age range: 125-112 mya
Stats:
Est. max. length: 0.8 meters
Est. max. hip height: 0.3 meters
Est. max. weight: 1.2 Kg
Diet: Carnivore
References
• Olsen S.L. (2000) "Countdown to Piltdown at National Geographic: The Rise and Fall of the Archaeoraptor".
• Xu X, Zhou Z. and Wang X. (2000) "The smallest known non-avian theropod dinosaur". (names Microraptor)
• Hone DWE, Tischlinger H, Xu X, Zhang F (2010) "The Extent of the Preserved Feathers on the Four-Winged Dinosaur Microraptor gui under Ultraviolet Light". (image credit)
• Xu X, Zhou Z, Wang X, Kuang X, Zhang F. and Du X. (2003) "Four-winged dinosaurs from China".
• Chatterjee S. and Templin R.J. (2007) "Biplane wing planform and flight performance of the feathered dinosaur Microraptor gui."
• Lida Xing, W. Scott Persons IV, Phil R. Bell, Xing Xu, Jianping Zhang, Tetsuto Miyashita, Fengping Wang & Philip J. Currie (2013) "Piscivory in the feathered dinosaur Microraptor".
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To cite this page:
Atkinson, L. "MICRORAPTOR :: from DinoChecker's dinosaur archive".
›. Web access: 24th Nov 2017.
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