作者
Sara Saber, Joseph JW Sertich, Gebely Abu El-Kheir, KA Ouda, S El-Sayed, PM O’Connor, ER Seiffert, HM Sallam
发表日期
2020
期刊
80th Annual Meeting of the Society of Vertebrate Paleontology. Virtual 2020. Abstract Volume
简介
Upper Cretaceous (Campanian) deposits of the Quseir Formation exposed in the New Valley, Western Desert of Egypt have yielded abundant remains of bony and cartilaginous fishes, turtles, and non-marine archosaurs, of which crocodyliforms are among the best represented. Here we report a new crocodyliform from the El Hindaw Member of the Quseir Fm. from the Baris Oasis, southern Kharga Oasis. The specimen consists of a nearly complete skull that is missing only portions of the midrostrum and both premaxillae. The new form shares a broad interfenestral bar with Eothoracosaurus but differs from other ‘thoracosaur’gavialoids in the following:(1) posterior process of squamosal short and medially deflected;(2) weakly sculpted postorbital on otherwise deeply sculpted cranial table;(3) supraoccipital with a pronounced medial ridge separating two deep fossae;(4) narrow posterior fenestral bar on the cranial table; and (5) dorsally arched cranial table in posterior view. The El Hindaw Member of the Quseir Fm. near Baris was deposited in a largely marginal marine, lagoonal setting and contains both non-marine (eg, sauropod dinosaurs) and nearshore semiaquatic (eg, pleurodire turtles, lungfish, the large neosuchian Wahasuchus) taxa. This new discovery extends the temporal range of Gavialoidea into the upper Campanian, though like other ‘thoracosaurs,’represents a relatively derived form indicating much deeper origins for gavialoid crocodyliforms. Together
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S Saber, JJW Sertich, GA El-Kheir, KA Ouda… - 80th Annual Meeting of the Society of Vertebrate …, 2020