In 1959 and 1960 a Soviet-Chinese expedition uncovered the remains of a euornithopod in Inner Mongolia near Maortu. The type species is Probactrosaurus gobiensis, described and named by A. K. Rozhdestvensky in 1966.[1] The generic name refers to Rozhdestvensky's hypothesis that Probactrosaurus would be the direct ancestor of Bactrosaurus, a notion now discarded.
The specific name refers to the Gobi desert. The holotype specimen, PIN 2232/1, a partial skeleton with skull, was found in layers of the Dashuigou Formation. Another partial skeleton, PIN 2232-10, was found along with numerous other fragments.[1]
Mandible and nasal bone.
In 1966 Rozhdestvensky also named a second species, Probactrosaurus alashanicus, based on fragmentary material. Its specific name refers to the Alxa League. In 2002 David B. Norman published a revision of the genus, in which he reported the holotype specimen of P. alashanicus, the back of a skull, had been lost after being dispatched from Moscow to Beijing. He concluded that the species was a synonym of P. gobiensis.[2]
In 1997 Lü Junchang named a third species, Probactrosaurus mazongshanensis, based on holotype IVPP V.11333 found in 1992. The specific name refers to the Mazong Shan region.[3] Today, this form is seen as more closely related to Equijubus and Altirhinus rather than to P. gobiensis and is therefore commonly referred to as "Probactrosaurus" mazongshanensis.[2] It was moved to the new genus Gongpoquansaurus in 2014.[4]
Descriptionedit
Size ComparisonLife reconstruction
Probactrosaurus was a herbivorous dinosaur. In 2010 Gregory S. Paul estimated its length at 5.5 metres (18 feet) and its weight at one tonne.[5]Probactrosauurus was lightly built, with relatively long and slender arms and hands and only a small thumb spike. It had a narrow snout, an elongated lower jaw and tooth batteries, each consisting of a superimposed double row of flattened cheek teeth; a third row of replacement teeth was incipient. Probably predominantly quadrupedal, it shared some common features with the later duck-billed dinosaurs.[6]
^ abcA.K. Rozhdestvensky (1966). "Novyye iguanodonty iz Tsentral'noy Azii. Filogeneticheskiye i taksonomicheskiye v zaimootnosheniya pozdnikh Iguanodontidae i rannikh Hadrosauridae. [New iguanodonts from Central Asia. Phylogenetic and taxonomic interrelationships of late Iguanodontidae and early Hadrosauridae]". Paleontologicheskii Zhurnal. 3: 103–116.
^ abDavid Norman (2002). "On Asian ornithopods (Dinosauria: Ornithischia). 4. Probactrosaurus Rozhdestvensky, 1966". Zoological Journal of the Linnean Society. 136 (1): 113–144. doi:10.1046/j.1096-3642.2002.00027.x.
^J. Lü (1997). "A new Iguanodontidae (Probactrosaurus mazongshanensis sp. nov.) from Mazongshan area, Gansu Province, China". Sino-Japanese Silk Road Dinosaur Expedition. China Ocean Press, Beijing: 27–47.
^You, H.-I.; Li, D.-Q.; Dodson, P. (2014). "Gongpoquansaurus mazongshanensis (Lü, 1997) comb. nov. (Ornithischia: Hadrosauroidea) from the Early Cretaceous of Gansu Province, Northwestern China". In Eberth, David A.; Evans, David C. (eds.). Hadrosaurs. Indiana University Press. pp. 73–76. ISBN978-0-253-01390-3.
^Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 292
^Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 145. ISBN978-1-84028-152-1.
^Norman, D.B. (2014). "On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna)". Zoological Journal of the Linnean Society. 2014: 1–98. doi:10.1111/zoj.12193.
probactrosaurus, meaning, before, bactrosaurus, early, herbivorous, hadrosauroid, iguanodont, dinosaur, lived, china, during, early, cretaceous, period, temporal, range, early, cretaceous, preꞒ, complete, skeleton, mounted, giga, dinosaur, exhibition, 2017, sc. Probactrosaurus meaning before Bactrosaurus is an early herbivorous hadrosauroid iguanodont dinosaur It lived in China during the Early Cretaceous period ProbactrosaurusTemporal range Early Cretaceous 113 101 Ma PreꞒ Ꞓ O S D C P T J K Pg N Complete skeleton mounted at the Giga Dinosaur Exhibition 2017 Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Clade Dinosauria Clade Ornithischia Clade Ornithopoda Superfamily Hadrosauroidea Genus ProbactrosaurusRozhdestvensky 1966 Type species Probactrosaurus gobiensisRozhdestvensky 1966 Synonyms Probactrosaurus alashanicus Rozhdestvensky 1966 Contents 1 Discovery and species 2 Description 3 Classification 4 See also 5 ReferencesDiscovery and species edit nbsp Mounted fossil In 1959 and 1960 a Soviet Chinese expedition uncovered the remains of a euornithopod in Inner Mongolia near Maortu The type species is Probactrosaurus gobiensis described and named by A K Rozhdestvensky in 1966 1 The generic name refers to Rozhdestvensky s hypothesis that Probactrosaurus would be the direct ancestor of Bactrosaurus a notion now discarded The specific name refers to the Gobi desert The holotype specimen PIN 2232 1 a partial skeleton with skull was found in layers of the Dashuigou Formation Another partial skeleton PIN 2232 10 was found along with numerous other fragments 1 nbsp Mandible and nasal bone In 1966 Rozhdestvensky also named a second species Probactrosaurus alashanicus based on fragmentary material Its specific name refers to the Alxa League In 2002 David B Norman published a revision of the genus in which he reported the holotype specimen of P alashanicus the back of a skull had been lost after being dispatched from Moscow to Beijing He concluded that the species was a synonym of P gobiensis 2 In 1997 Lu Junchang named a third species Probactrosaurus mazongshanensis based on holotype IVPP V 11333 found in 1992 The specific name refers to the Mazong Shan region 3 Today this form is seen as more closely related to Equijubus and Altirhinus rather than to P gobiensis and is therefore commonly referred to as Probactrosaurus mazongshanensis 2 It was moved to the new genus Gongpoquansaurus in 2014 4 Description edit nbsp Size Comparison nbsp Life reconstruction Probactrosaurus was a herbivorous dinosaur In 2010 Gregory S Paul estimated its length at 5 5 metres 18 feet and its weight at one tonne 5 Probactrosauurus was lightly built with relatively long and slender arms and hands and only a small thumb spike It had a narrow snout an elongated lower jaw and tooth batteries each consisting of a superimposed double row of flattened cheek teeth a third row of replacement teeth was incipient Probably predominantly quadrupedal it shared some common features with the later duck billed dinosaurs 6 Classification editProbactrosaurus was originally assigned by Rozhdestvenky to the Iguanodontidae 1 Today it is seen as a basal member of the Hadrosauroidea relatively closely related to the Hadrosauromorpha 7 See also edit nbsp Wikimedia Commons has media related to Probactrosaurus Timeline of hadrosaur researchReferences edit a b c A K Rozhdestvensky 1966 Novyye iguanodonty iz Tsentral noy Azii Filogeneticheskiye i taksonomicheskiye v zaimootnosheniya pozdnikh Iguanodontidae i rannikh Hadrosauridae New iguanodonts from Central Asia Phylogenetic and taxonomic interrelationships of late Iguanodontidae and early Hadrosauridae Paleontologicheskii Zhurnal 3 103 116 a b David Norman 2002 On Asian ornithopods Dinosauria Ornithischia 4 Probactrosaurus Rozhdestvensky 1966 Zoological Journal of the Linnean Society 136 1 113 144 doi 10 1046 j 1096 3642 2002 00027 x J Lu 1997 A new Iguanodontidae Probactrosaurus mazongshanensis sp nov from Mazongshan area Gansu Province China Sino Japanese Silk Road Dinosaur Expedition China Ocean Press Beijing 27 47 You H I Li D Q Dodson P 2014 Gongpoquansaurus mazongshanensis Lu 1997 comb nov Ornithischia Hadrosauroidea from the Early Cretaceous of Gansu Province Northwestern China In Eberth David A Evans David C eds Hadrosaurs Indiana University Press pp 73 76 ISBN 978 0 253 01390 3 Paul G S 2010 The Princeton Field Guide to Dinosaurs Princeton University Press p 292 Palmer D ed 1999 The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals London Marshall Editions p 145 ISBN 978 1 84028 152 1 Norman D B 2014 On the history osteology and systematic position of the Wealden Hastings group dinosaur Hypselospinus fittoni Iguanodontia Styracosterna Zoological Journal of the Linnean Society 2014 1 98 doi 10 1111 zoj 12193 nbsp Dinosaurs portal nbsp This article related to ornithopod dinosaurs is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Probactrosaurus amp oldid 1223278402, wikipedia, wiki, book, books, library,
