A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Lo Hueco (Cuenca, Spain)

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• 作者：V. Dí ; ez Dí ; az^a ; P. Mocho^b ; A. Pá ; ramo^b ; ^c ; F. Escaso^b ; F. Marcos-Ferná ; ndez^d ; ^b ; J.L. Sanz^c ; F. Ortega^b ; ^{fortega@ccia.uned.es" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Lohuecotitan pandafilandi gen. et sp. nov. ; Titanosauria ; Lithostrotia ; Spain ; Late Cretaceous
• 刊名：Cretaceous Research
• 出版年：2016
• 出版时间：31 December 2016
• 年：2016
• 卷：68
• 期：Complete
• 页码：49-60
• 全文大小：4331 K

文摘

The upper Campanian-lower Maastrichtian site of Lo Hueco (Cuenca, Spain) has provided a set of well-preserved partial skeletons in anatomical connection or with a low dispersion of their skeletal elements. One partial skeleton is herein described and a new titanosaurian sauropod is established, Lohuecotitan pandafilandi. This titanosaur is diagnosed by eight autapomorphic features: dorsally and ventrally widened or bifurcated posterior centrodiapophyseal lamina in anterior and middle dorsal vertebrae; short postspinal lamina with a transversely expanded distal end represented by smooth scars in the dorsal vertebrae; anteriormost caudals with the medial spinoprezygapophyseal and medial spinopostzygapophyseal laminae ventrally connected with the prespinal and postspinal laminae, respectively; anterior caudal neural spines with a dorsal projection of the prespinal and postspinal laminae; anterior caudal neural spines bears a “greek-cross”-like cross-section; middle caudal centra having two round and rough structures in the dorsal edge of the posterior articulation, which extends to the dorsal surface of the centrum; the articular ends of the rami of the haemal arches are divided in two articular surfaces; and tuberosity between the anterior and the lateral trochanter of the fibula. The herein performed phylogenetic analysis considered L. pandafilandi as a member of Lithostrotia more derived than Malawisaurus. The known palaeodiversity of the Late Cretaceous Ibero-Armorican titanosaurs is increasing, and further analyses focused on this group will be necessary to better understand the evolutionary history of European titanosaurs and to clarify their relationships within Titanosauria.