STUDY GUIDE What to Know About This Relaxed Show
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New Australian Sauropods Shed Light on Cretaceous Dinosaur Palaeobiogeography Received: 15 April 2016 Stephen F
www.nature.com/scientificreports OPEN New Australian sauropods shed light on Cretaceous dinosaur palaeobiogeography Received: 15 April 2016 Stephen F. Poropat1,2,*,, Philip D. Mannion3,*, Paul Upchurch4,*, Scott A. Hocknull5, Accepted: 13 September 2016 Benjamin P. Kear1,6, Martin Kundrát7,8, Travis R. Tischler2, Trish Sloan2, George H. K. Sinapius2, Published: 20 October 2016 Judy A. Elliott2 & David A. Elliott2 Australian dinosaurs have played a rare but controversial role in the debate surrounding the effect of Gondwanan break-up on Cretaceous dinosaur distribution. Major spatiotemporal gaps in the Gondwanan Cretaceous fossil record, coupled with taxon incompleteness, have hindered research on this effect, especially in Australia. Here we report on two new sauropod specimens from the early Late Cretaceous of Queensland, Australia, that have important implications for Cretaceous dinosaur palaeobiogeography. Savannasaurus elliottorum gen. et sp. nov. comprises one of the most complete Cretaceous sauropod skeletons ever found in Australia, whereas a new specimen of Diamantinasaurus matildae includes the first ever cranial remains of an Australian sauropod. The results of a new phylogenetic analysis, in which both Savannasaurus and Diamantinasaurus are recovered within Titanosauria, were used as the basis for a quantitative palaeobiogeographical analysis of macronarian sauropods. Titanosaurs achieved a worldwide distribution by at least 125 million years ago, suggesting that mid-Cretaceous Australian sauropods represent remnants of clades which were widespread during the Early Cretaceous. These lineages would have entered Australasia via dispersal from South America, presumably across Antarctica. High latitude sauropod dispersal might have been facilitated by Albian–Turonian warming that lifted a palaeoclimatic dispersal barrier between Antarctica and South America. -
Fossil Focus: Dinosaurs Down Under Author(S): Stephen F
www.palaeontologyonline.com |Page 1 Title: Fossil Focus: Dinosaurs Down Under Author(s): Stephen F. Propat *1 Volume: 5 Article: 1 Page(s): 1-11 Published Date: 01/01/2015 PermaLink: http://www.palaeontologyonline.com/articles/2015/fossil-focus-dinosaurs/ IMPORTANT Your use of the Palaeontology [online] archive indicates your acceptance of Palaeontology [online]'s Terms and Conditions of Use, available at http://www.palaeontologyonline.com/site-information/terms-and-conditions/. COPYRIGHT Palaeontology [online] (www.palaeontologyonline.com) publishes all work, unless otherwise stated, under the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license. This license lets others distribute, remix, tweak, and build upon the published work, even commercially, as long as they credit Palaeontology[online] for the original creation. This is the most accommodating of licenses offered by Creative Commons and is recommended for maximum dissemination of published material. Further details are available at http://www.palaeontologyonline.com/site-information/copyright/. CITATION OF ARTICLE Please cite the following published work as: Propat, Stephen F.. 2015. Fossil Focus: Dinosaurs Down Under, Palaeontology Online, Volume 5, Article 1, 1- 11. Published by: Palaeontology [online] www.palaeontologyonline.com |Page 2 Fossil Focus: Dinosaurs Down Under by Stephen F. Poropat*1,2 Introduction: Ask the average person in the street to name an Australian dinosaur, and you will be lucky if you get a correct answer. If they say crocodile, they are in the right postcode but have the wrong address. If they say emu, then they are correct, strictly speaking, but they are either lucky or being smart. If they say kangaroo, back away slowly and avoid eye contact. -
Triassic Jurassic C Re Tac E O Us
Australovenator Winton wintonensis It may have had feathers Oss-trah-low-ven-ah-tore win-ton-enn-siss or a scaly skin. Cretaceous Its nickname is ‘Banjo’ in honour of Banjo Patterson who wrote Waltzing Matilda. Carnivore Jurassic Type: Theropod The ‘cheetah’ of the dinosaur world. Its long, muscly legs made it a fast runner. Triassic Illustration by Lida Xing Diamantinasaurus Winton matildae Herbivore Di-ah-man-teen-ah-sore-us mah-till-day Cretaceous Matilda was longer than a bus. The fossil was found in an ancient billabong. Its nickname is ‘Matilda, from Banjo Patterson’s Type: Sauropod Jurassic Waltzing Matilda. Triassic Illustration by Lida Xing Leaellynasaura amicagraphica Dinosaur Cove Lay-ell-inn-ah-sore-ah am-ick-ah-graf-ick-ah Cretaceous It had a very long tail, the longest of any dinosaur, relative to its body size. Herbivore It lived in the cold, close to the Antarctic Circle. Jurassic Type: Ornithopod Known as the ‘dinosaur of the darkness’. It had large eyes to help it see in the dark. Triassic Illustration by Lida Xing Minmi paravertebra Roma Min-mee pah-rah-vert-eh-brah Cretaceous Herbivore It didn’t have a club on the end of its tail like other ankylosaurs. The most complete fossil of an Australian dinosaur. Jurassic It had bony armour on its back to protect it from carnivores. Type: Ankylosaur Triassic Illustration by Lida Xing Muttaburrasaurus langdoni Muttaburra Mutt-ah-burr-ah-sore-us lang-don-eye It had a horny beak to snip off tough leaves and could have given a powerful bite. -