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العنوان
Upper cretaceous dinosaur remains from the Dakhla and Kharga Oases, Western Desert, Egypt :
المؤلف
El-Dawoudi, Iman Abd El-Aziz Ali Mohammed.
هيئة الاعداد
باحث / إيمان عبدالعزيز على الداوودى
مشرف / محمود أحمد قورة
مشرف / هشام محمد سلام
مناقش / عبدالفتاح على على زلط
الموضوع
Dinosaurs. Vertebrates, Fossil. Paleontology - Cretaceous.
تاريخ النشر
2017.
عدد الصفحات
177 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الجيولوجيا
تاريخ الإجازة
01/03/2018
مكان الإجازة
جامعة المنصورة - كلية العلوم - Geology
الفهرس
Only 14 pages are availabe for public view

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from 177

Abstract

A new dinosaur material ; Mansourasaurus shahinae (partial skeleton) that includes a skull fragment, part of the lower left and right jaws, three cervical vertebrae and cervical ribs, two dorsal vertebrae, caudal vertebra, fragments of dorsal ribs, number of limb bones, right scapulo-coracoid, sternal plate, both humeri, left radius, right ulna, metacarpal III, metatarsal I and metatarsal III was collected from the Upper Cretaceous (Campanian) Quseir Formation of Egypt. It is the most completely preserved land-living vertebrate being documented and described from the post Cenomanian of the African Continent. Mansourasaurus shahinae is recognized as a new genus and species of lithostrotian titanosaur Additional dinosaur vertebrate material including numerous representatives of saurischian and ornithoscelidan dinosaur fossils (25 specimens) have been collected from the Quseir and the Duwi formations. They include a variety of postcranial elements referable to saurischian Sauropoda and ornithoscelidan Theropoda. In the Tineida research area (Dakhla Oasis),. They represent both juvenile and adult individuals which add significantly to the known latest Cretaceous diversity of Afro-Arabia. The Parsimony and Bayesian techniques were used to assess the phylogenetic position of Mansourasaurus shahinae and to determine whether the hypothesised affinities of the taxon changed depending on the method implemented. In the Parsimony analyses, the strict consensus tree analysis places Mansourasaurus shahinae in a large polytomy within Lithostrotia and its recovery may indicate the presence of an Afro-European clade that diverged slightly earlier than estimated from the tip-dating Bayesian analysis due to the inclusion of the stratigraphically older (~110–100 Ma) Rukwatitan within this clade. Continuing reconnaissance paleontology and geology in the areas adjacent to the Dakhla and Kharga oases should provide significant new insights into the vertebrate faunas that inhabited northern Africa during the last part of the Cretaceous Period.