Tuesday, November 5, 2019

Dahalokely - Facts and Figures

Dahalokely - Facts and Figures Name: Dahalokely (Malagasy for small bandit); pronounced DAH-hah-LOW-keh-lee Habitat: Woodlands of Madagascar Historical Period: Mid-Late Cretaceous (90 million years ago) Size and Weight: About 12 feet long and 300-500 pounds Diet: Meat Distinguishing Characteristics: Moderate size; bipedal posture; distinctively shaped vertebrae About Dahalokely Like many regions of the earth, the Indian Ocean island of Madagascar (off the eastern coast of Africa) harbors a huge gap in its fossil record, stretching all the way from the late Jurassic to the late Cretaceous periods. The importance of Dahalokely (which was announced to the world in 2013) is that this meat-eating dinosaur lived 90 million years ago, shaving about 20 million years off the far end of Madagascars almost 100-million-year fossil gap. (Its important to bear in mind that Madagascar wasnt always an island; a couple of million years after Dahalokely lived, this landmass split off from the Indian subcontinent, which itself had yet to collide with the underside of Eurasia.) What does the provenance of Dahalokely, combined with the history of Madagascar, tell us about the distribution of theropod dinosaurs in during late Cretaceous period? Since Dahalokely has been tentatively classified as a modestly sized abelisaura breed of meat-eating predator ultimately descended from the South American Abelisaurusthis may be a hint that it was ancestral to Indian and Madagascan theropods of the later Cretaceous, like Masiakasaurus and Rajasaurus. However, given the scarcity of Dahalokelys fossil remainsall we have for now is the partial skeleton of a subadult specimen, lacking the skullmore evidence will be needed to conclusively establish this link.

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