Kazaklambia convincens comb. nov., a primitive juvenile lambeosaurine from the Santonian of Kazakhstan |
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| Institution: | 1. Pipestone Creek Dinosaur Initiative, 10001 84th Avenue, Clairmont, Alberta T0H 0W0, Canada;2. Department of Ecology and Evolutionary Biology, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga, Ontario L5L 1C6, Canada;1. The Geology Museum, 1215 W. Dayton St., Madison, WI 53706, USA;2. Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul. 123, Moscow 117997, Russia;1. Instituto Patagónico de Geología y Paleontología (IPGP–CONICET), Boulevard Almirante Brown 2915, 9120, Puerto Madryn, Chubut, Argentina;2. Laboratorio de Paleontologia de Vertebrados, Universidad Nacional de la Patagonia San Juan Bosco, Ruta prov. N°1 Km 4, 9000, Comodoro Rivadavia, Chubut, Argentina;3. CONICET, Museo Municipal “Ernesto Bachmann”, Dr. Natali S/N, Villa El Chocón, 8311, Neuquén, Argentina;4. Centro de Investigaciones y Transferencia Golfo San Jorge, Ruta provincial n°1, km. 4, Comodoro Rivadavia, Chubut, Argentina;5. CONICET, Laboratorio y Museo de Dinosaurios, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Avda. Padre Contreras 1300, 5500, Mendoza, Argentina;1. CONICET-Instituto de Investigaciones en Paleobiología y Geología, Universidad Nacional de Río Negro, Avenida Roca 1242, General Roca 8332, Río Negro, Argentina;2. CONICET-Museo Carlos Ameghino, Belgrano 1700, Paraje Pichi Ruca (predio Marabunta), Cipolletti R8324, Río Negro, Argentina;3. CONICET, Museo Paleontológico Egidio Feruglio, Trelew 9100, Chubut, Argentina;4. CONICET-UNNE, Centro de Ecología Aplicada del Litoral. Laboratorio de Paleontología de Vertebrados. Ruta 5 Km 2,5, 3400, Corrientes, Argentina;1. Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;2. Long Hao Institute of Geology and Paleontology, Hohhot 010010, China;3. Bureau of Land and Resources of Bayannur, Bayannur 015000, China;4. Inner Mongolia Museum of Natural History, Hohhot 010020, China;5. Beijing Museum of Natural History, Beijing Academy of Science and Technology, Beijing 100050, China;1. Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, 199034 Saint Petersburg, Russia;2. Department of Sedimentary Geology, Geological Faculty, Saint Petersburg State University, 16 Liniya VO 29, 199178 Saint Petersburg, Russia;3. Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, MRC 121, P.O. Box 37012, Washington, DC 20013-7012, USA |
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| Abstract: | The holotype of ‘Procheneosaurus’ convincens, a juvenile lambeosaurine, is the most complete hadrosaurid known from Kazakhstan. North American species of Procheneosaurus are considered juveniles of Corythosaurus, Hypacrosaurus, and Lambeosaurus, rendering the generic name unusable. A replacement name, Kazaklambia convincens comb. nov., is herein proposed as this specimen is morphologically distinct from other Eurasian taxa and known juvenile lambeosaurines at a similar ontogenetic stage in having a prefrontal process of the postorbital with a dorsal thickening forming a dome lateral to the frontal dome, doming of the nasal anterodorsal to the orbit, and a frontal length/width ratio <1. The juvenile status of Kazaklambia makes phylogenetic placement difficult; however, morphometric and morphological information (particularly in relation to the hollow cranial crest and the length of the frontal) suggest a close affiliation with the basal lambeosaurines Amurosaurus and Tsintaosaurus, and support the hypothesis for an Asian origin for Lambeosaurinae. |
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| Keywords: | Lambeosaurinae Asia Taxonomy Cretaceous |
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