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INDOSAURUS

a meat-eating majungasaurine abelisaurid theropod dinosaur from the Late Cretaceous of India.
Indosaurus
Pronunciation: IN-do-SOR-us
Meaning: Indian Lizard
Author/s: Huene and Matley (1933)
Synonyms: Megalosaurus matleyi
First Discovery: Madhya Pradesh, India
Chart Position: 132

Indosaurus matleyi

Indosaurus has caused paleontologists nightmares ever since its remains were discovered by Charles Alfred Matley between 1917 and 1919 in the "dinosaur bed" — an area of India's Lameta Formation spanning no more than 20 square yards — along with ten other dinosaurs that have since been named, and they are all based on scrappy remains that aren't particularly well preserved.

In 1933 Friedrich von Huene described its meagre remains and assigned them to Allosauridae. But its "extremeley thickened" skull bones were later moved to Abelisauridae 'cos features of said skull hinted at the presence of horns like fellow abelisaurid Carnotaurus, though this is hard to prove since its holotype remains, and thus all evidence, has been lost.

If Indosaurus is related to South America's "meat-eating bull" then India may not have been a separate continent for the last 100 million years as many paleontologists had thought, and it's possible instead that the two land masses were still connected intermittently by land bridges, allowing dinosaurs from both areas to migrate as "recently" as 70 million years ago.

As research plods on, we suspect that many of the Lameta theropods will be sunk into each other, trimming the current eleven down to two or possibly three. Megalosaurus matleyi has already been referred to Indosaurus, and Indosuchus and Compsosuchus may belong there too. Furthermore, some paleontologists reckon the differences between Indosaurus, Rajasaurus and Lametasaurus are merely artifacts of preservation, and if they do represent three specimens of the same critter then the latter would be the only valid name as it was coined first.
(Matley's Indian Lizard)Etymology
Indosaurus is derived from the Greek "Indos" (India) and the Greek "sauros" (lizard).
The species epithet, matleyi, honors British geologist Charles Alfred Matley.
Discovery
The remains of Indosaurus were discovered in the Carnosaur bed member of the Lameta Formation at Bara Simla Hill, near Jabalpur (aka Jubbulpore), Narmada Valley, Madhya Pradesh, India, by Matley and Durgasankar Bhattacharji between 1917 and 1919. The holotype (GSI IM K27/565) is a partial braincase. More remains have since been discovered but have yet to be described and, funnily enough, the braincase is now lost.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Maastrichtian
Age range: 71-66 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Carnivore
References
• Huene von F and Matley CA (1933) "The Cretaceous Saurischia and Ornithischia of the Central Provinces of India". Palaeontologica Indica, Memoirs of the Geological Survey of India 21(1): 1-74.
• Chatterjee S (1978) "Indosuchus and Indosaurus, Cretaceous carnosaurs from India". Journal of Paleontology, 52(3): 570-580.
• Carrano, Mathew T and Sampson, Scott SD (2008) "The Phylogeny of Ceratosauria". Journal of Systematic Palaeontology, 6(2): 183–236.
• Brett-Surman MK, Holtz TR and Farlow JO (2012) "The Complete Dinosaur: Second Edition".
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To cite this page:
Atkinson, L. "INDOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 23rd Jul 2017.
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