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Mosasaurus Halisaurus Jaw 2.9ft

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With 30+ years experience and 5 star ratings across Google, Trustpilot and Facebook, you will discover we’re passionate about creating ethereally aesthetic fossil accents for luxury spaces, collectors and enthusiast alike across the world. With quality fossil products and a service to match, you won’t be disappointed - our reviews speak for themselves ≈

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Please note: THE FOSSIL STORE™ is able to deal with small items with ease. However, because we are a small family ran business we want to make sure your items are prepared and packaged securely. We're not a chain and our products required a little more consideration to arrive to you safely.

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Halisaurus arambourgi mosasaur jaw and partial vertebrae measuring 2.9ft, including a well-preserved, nearly complete skull and with lower jaws skeleton, and a partial skull that preserves details of the braincase and quadrate. Halisaurus appeared relatively early in the evolutionary history of the mosasaurs, during the Santonian. As such, the genus retains many primitive characteristics, as does the Halisaurinae at large. Both H. platyspondylus and H. arambourgi reached lengths of between 3 and 4 metres (9.8 - 13.1 feet). The length of the dubious H. onchognathus is difficult to tell due to the lack of remains but was likely similar.

As in other halisaurines, the flippers of Halisaurus are poorly differentiated which means that the genus lacked the hydrophalangy of more advanced mosasaurs. That Halisaurus was a relatively poor swimmer is relatively surprising considering its small size, since other small and medium-sized mosasaurs were mostly adept swimmers.

Classification and Species: The exact position of Halisaurus within the larger mosasaur family tree has long been considered controversial. The type specimen of H. platyspondylus is not comprehensive and only preserves an angular and a basicranium fragment. Though the specimen does not reveal much about the mosasaur, it was noted by D.A. Russell in his Systematics and Morphology of American Mosasaurs (1967) that the angular resembles that of Platecarpus but is more symmetrically heart-shaped in anterior aspect and appears slightly inflated in later profile with a convex anteroventral outline that is continuous with the anteroexternal margin of the articular surface, as in the genus Clidastes. The similarities with both Platecarpus and Clidastes were problematic, as said genera have always been classified in separate subfamilies, the Plioplatecarpinae and Mosasaurinae respectively. Russell referred the genus to the Plioplatecarpinae on the basis of a Platecarpus-like suprastapedial process in specimens referred to H. onchognathus.

The recent most major phylogenetic analysis of mosasaurs, conducted by Tiago R. Simões and colleagues in May 2017, recovered Halisaurus and the rest of the Halisaurinae as a sister group to the Mosasaurinae. This would mean that the halisaurines are more closely related to the mosasaurines than the russellosaurines (genera such as Tylosaurus and Plesiopatecarpus) are.

Genus: Mosasaurus. Halisaurus arambourgi.
Age: Late Cretaceous, approximately 86.3 to 66 million years.
Origin: Ouled Bouali, Morocco, North Africa.

Mosasaurus measurements.
Length: 97 cm
Width: 60 cm
Depth: 14 cm

Weight: 48.734 Kg

Mosasaur Halisaurus Scale to man

MOSASAURUS HALISAURUS. 4M / 13.1FT
HOMO SAPIEN. 1.8M / 6FT

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