2009 in archosaur paleontology
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The year 2009 in Archosaur paleontology was eventful. Archosaurs include the only living dinosaur group — birds — and the reptile crocodilians, plus all extinct dinosaurs, extinct crocodilian relatives, and pterosaurs. Archosaur palaeontology is the scientific study of those animals, especially as they existed before the Holocene Epoch began about 11,700 years ago. The year 2009 in paleontology included various significant developments regarding archosaurs.
This article records new taxa of fossil archosaurs of every kind that have been described during the year 2009, as well as other significant discoveries and events related to paleontology of archosaurs that occurred in the year 2009.
Crurotarsans
- Delfino, M.; Smith, T. (2009). "A reassessment of the morphology and taxonomic status of 'Crocodylus' depressifrons Blainville, 1855 (Crocodylia, Crocodyloidea) based on the Early Eocene remains from Belgium". Zoological Journal of the Linnean Society 156 (1): 140–167. doi:10.1111/j.1096-3642.2008.00478.x.
Newly named crurotarsans | |||||||
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Name | Status | Authors | Age | Unit | Location | Notes | Images |
Armadillosuchus[1] |
Valid |
|
Late Cretaceous |
Notosuchian with heavy, armadillo-like body armor consisting of flexible bands and rigid shields |
| ||
Barcinosuchus[2] |
Valid |
|
Aptian – Albian |
||||
Collilongus[3] |
Valid |
|
Early Olenekian |
Czatkowice 1 |
Possible rauisuchian |
||
Coringasuchus[4] |
Valid |
|
Early Cenomanian |
||||
Duerosuchus[5] |
Valid |
|
Middle Eocene |
||||
Hypselorhachis[6] |
Valid |
|
Middle Triassic |
Possible ctenosauriscid |
|||
Kaprosuchus[7] |
Valid |
|
Upper Cretaceous |
Unusual large mahajangasuchid with hypertrophied caniniform teeth and posteriorly projecting horns |
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Kemkemia[8] |
Valid |
|
Cenomanian |
Initially identified as a theropod dinosaur,[8] but subsequently discovered to be a crocodyliform.[9] |
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Khoratosuchus[10] |
Valid |
|
Early Cretaceous |
Youngest Mesozoic crocodyliform yet known from Thailand |
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Laganosuchus [7] |
Valid |
|
Cenomanian |
| |||
Miadanasuchus [11] |
Valid |
|
Campanian |
A new genus for "Trematochampsa" oblita (Buffetaut & Taquet, 1979) |
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Morrinhosuchus[12] |
Valid |
|
Late Cretaceous |
Notosuchian from Brazil |
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Penghusuchus[13] |
Valid |
|
Late Miocene |
A tomistomine crocodilian. |
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Polonosuchus[14] |
Valid |
|
Late Carnian |
A new genus for "Teratosaurus" silesiacus (Sulej, 2005) |
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Yacarerani [15] |
Valid |
|
Late Cretaceous |
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Non-avian dinosaurs
Research
- A new study on theropod furculae is published.[16]
- A "detailed description of the skull and mandible of the Chinese cerapodan ornithischian dinosaur Jeholosaurus shangyuanensis" is published.[17]
- Knoll, F., Padian, K., and de Ricqles, A. 2009. Ontogenetic change and adult body size of the early ornithischian dinosaur Lesothosaurus diagnosticus: Implications for basal ornithischian taxonomy. Gondwana Research. doi:10.1016/j.gr.2009.03.010.
- Matthews, J. C., Brusatte, S. L., Williams, S. A., and Henderson, M. D., 2009, The first Triceratops bonebed and its implications for gregarious behavior Journal of Vertebrate Paleontology v. 29, n. 1, p. 286-290.
- Williamson, T. E., Carr, T. D., Williams, S. A., and Tremaine, K., 2009, Early ontogeny of pachycephalosaurine squamosals as revealed by juvenile specimens from the Hell Creek Formation, eastern Montana: Journal of Vertebrate Paleontology, v. 29, n. 1, p. 291-294.
- Bittencourt, J.S.; Kellner, A.W.A. (2009). "The anatomy and phylogenetic position of the Triassic dinosaur Staurikosaurus pricei Colbert, 1970". Zootaxa 2079: 1–56.
- Chin, K.; Hartman, J.H.; Roth, B. (2009). "Opportunistic exploitation of dinosaur dung: fossil snails in coprolites from the Upper Cretaceous Two Medicine Formation of Montana". Lethaia 42 (2): 185–198. doi:10.1111/j.1502-3931.2008.00131.x.
- Maidment, S.C.R., and Porro, L.B. 2009. Homology of the palpebral and origin of supraorbital ossifications in ornithischian dinosaurs. Lethaia. doi:10.1111/j.1502-3931.2009.00172.x.
- Gates, T.A., and Farke, A.A. 2009. Biostratigraphic and biogeographic implications of a hadrosaurid (Ornithopoda: Dinosauria) from the Upper Cretaceous Almond Formation of Wyoming, USA. Cretaceous Research. doi:10.1016/j.cretres.2009.05.001.
- Moratalla, J.J.; Hernán, J. (2008). "Los Cayos S y D: dos afloramientos con icnitas de saurópodos, terópodos y ornitópodos en el Cretácico Inferior del área de Los Cayos (Cornago, La Rioja, España)". Estudios Geológicos 64 (2): 161–173. doi:10.3989/egeol.08642.043.
- Taylor, M.P.; Wedel, M.J.; Naish, D. (2009). "Head and neck posture in sauropod dinosaurs inferred from extant animals". Acta Palaeontologica Polonica 54 (2): 213–220. doi:10.4202/app.2009.0007.
Hadrosaur chewing study
A study titled "Quantitative analysis of dental microwear in hadrosaurid dinosaurs, and the implications for hypotheses of jaw mechanics and feeding" is published by British paleontologists Mark Purnell, Paul Barrett and student Vince Williams. The paper examined the chewing methods and diet of hadrosaurid ("duck billed") dinosaurs from the Late Cretaceous period. The scientists analyzed hundreds of microscopic scratches on the teeth of a fossilized Edmontosaurus jaw, and believe they determined exactly how a hadrosaur broke down and ate its food, which had previously eluded researchers.
The study found hadrosaurs had a unique way of eating unlike any creature living today. In contrast to a flexible lower jaw joint prevalent in today's mammals, hadrosaurs had a unique hinge between the upper jaws and the rest of its skull. The team found the dinosaur's upper jaws pushed outwards and sideways while chewing, as the lower jaw slid against the upper teeth.
The study also concluded that hadrosaurs likely grazed on horsetails and vegetation close to the ground, rather than browsing higher-growing leaves and twigs. However, Purnell said these conclusions were less secure than the more conclusive evidence regarding the motion of teeth while chewing. Previous studies found contradictory conclusions, and the issue remains a subject of debate.
The findings were published on June 30, 2009 in the journal, The Proceedings of the National Academy of Sciences. Purnell said no previous study had ever employed this method of analyzing microscopic teeth scratches, and that the method could be used to study other areas of scientific research.
New taxa
Data courtesy of George Olshevky's dinosaur genera list.[18] ~44 dinosaur genera were erected in 2009.
Name | Status | Authors | Discovery year | Age | Unit | Location | Notes | Images |
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Adeopapposaurus[19] | Valid |
|
| |||||
Aerosteon[20] | Valid |
| ||||||
Valid |
|
|||||||
Albertonykus[22] | Valid |
|
lower Maastrichtian |
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Anchiornis[23] | Valid |
|
| |||||
Valid |
|
|||||||
Valid |
|
|||||||
Valid |
|
| ||||||
Baotianmansaurus[27] |
Valid |
|
||||||
Valid |
|
|||||||
Ceratonykus[29] |
Valid |
|
| |||||
Diamantinasaurus[30] |
Valid |
|
| |||||
Valid |
|
|||||||
Helioceratops[32] |
Valid |
|
||||||
Hesperonychus[33] |
Valid |
|
Smallest known dinosaur from North America. |
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Valid |
|
Xinminpu Group |
||||||
Kinnareemimus[35] |
Valid |
|
||||||
Kol[36] |
Valid |
|
| |||||
Valid |
|
|||||||
Levnesovia[38] | Valid |
|
The oldest Hadrosauroidean |
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Limusaurus[39] | Valid |
|
The first Asian ceratosaur to be discovered |
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Luoyanggia[40] | Valid |
|
Mangchuan Formation |
An oviraptorosaur |
||||
Malarguesaurus[41] | Valid |
|
||||||
Minotaurasaurus[42] | Valid |
|
| |||||
Miragaia[43] | Valid |
|
Long necked stegosaur. |
| ||||
Valid |
|
| ||||||
Panphagia[44] | Valid |
|
The most basal known sauropodomorph.[44] |
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Valid |
|
Xinminpu Group |
| |||||
| ||||||||
Ruyangosaurus[46] |
Valid |
|
Mangchuan Formation |
|||||
Shaochilong[47] |
Valid |
|
| |||||
Shidaisaurus[48] |
Valid |
|
Upper Lufeng Formation |
|||||
Valid |
|
|||||||
Skorpiovenator[50] | Valid |
|
| |||||
|
Irhazer Group |
| ||||||
Valid |
|
|||||||
Valid |
|
| ||||||
Valid |
|
Liburnia Formation |
| |||||
Valid |
|
| ||||||
Valid |
|
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Xianshanosaurus[40] | Valid |
|
Mangchuan Formation |
A sauropod |
||||
"Xinghesaurus" |
|
Name published without scientific description in Japanese guidebook "Dinosaur Expo 2009: The Miracle of Deserts" | ||||||
Valid |
|
| ||||||
Aves
Research
- Anfinson, O.A., Lockley, M.G., Kim, S.H., Kim, K.S., and Kim, J.Y. 2009. First report of the small bird track Koreanaornis from the Cretaceous of North America: implications for avian ichnotaxonomy and paleoecology. Cretaceous Research. doi:10.1016/j.cretres.2009.02.001.
- Lockley, M., Chin, K., Houck, K., Matsukawa, M., and Kukihara, R. 2009. New interpretations of Ignotornis, the first-reported Mesozoic avian footprints: implications for the paleoecology and behavior of an enigmatic Cretaceous bird. Cretaceous Research. doi:10.1016/j.cretres.2009.04.001.
- Bell, A.; Everhart, M.J. (2009). "A new specimen of Parahesperornis (Aves: Hesperornithiformes) from the Smoky Hill Chalk (Early Campanian) of western Kansas". Transactions of the Kansas Academy of Science 112 (1/2): 7–14. doi:10.1660/062.112.0202.
Newly described birds
Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images | |
---|---|---|---|---|---|---|---|---|---|
Gen. nov. et Sp. nov. |
Valid |
Federico L. Agnolin Agustín G. Martinelli |
Placed in ?Patagopterygiformes by Agnolin and Martinelli. |
||||||
Gen. nov. et Sp. nov. |
Valid |
Late Oligocene |
Etadunna Formation |
An Anatidae. |
|||||
Bonasa nini [59] |
Sp. nov. |
Valid |
Antonio Sánchez Marco |
Early Pleistocene |
Lower Elefante, TE 13 layer |
A Phasianidae. |
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Calidris janossyi [60] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Miocene |
Originally described as a member of Scolopacidae belonging to the genus Calidris;[60] Zelenkov, Volkova and Gorobets (2016) reinterpreted it as a member of Turnicidae and transferred it to the genus Ortyxelos.[61] |
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Calonectris kurodai [62] |
Sp. nov. |
Valid |
Middle Miocene |
USA: |
A Procellariidae, the smallest of the genus. |
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Cariama santacrucensis [63] |
Sp. nov. |
Valid |
Jorge I. Noriega Sergio F. Vizcaino Susana Bargo |
Early-Middle Miocene |
Estancia La Costa Member, Santa Cruz Formation |
A Cariamidae, Federico L. Agnolin, 2009, placed this species in Noriegavis Agnolin, 2009.[64] |
|||
Charadrius lambrechti.[60] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Miocene |
A Scolopacidae. |
||||
Clangula matraensis [65] |
Sp. nov. |
Valid |
Jenö Kessler |
Middle Miocene |
MN 6-8 |
An Anatidae. |
|||
Sp. nov. |
Valid |
Zuhui Zhang Chunling Gao Qingjin Meng Jinyuan Liu Lianhai Hou Guangmei Zheng |
|||||||
Cygnopterus neogradiensis [67] |
Sp. nov. |
Valid |
Jenö Kessler János Hír |
Middle Miocene |
Sajóvölgy Formation, MN 7-8 |
An Anatidae. |
|||
Diomedeoides harmati [68] |
Sp. nov. |
Valid |
Jenö Kessler |
Early Oligocene |
A Diomedeoididae Fischer, 1985, placed in Rupelornis van Beneden, 1871 by Gerald Mayr and Thierry Smith, 2012 |
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Egretta polgardiensis [65] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Miocene |
An Ardeidae |
||||
Gen. nov. et Sp. nov. |
Valid |
An Enantiornithes Walker, 1981, Euenantiornithes Chiappe, 2002, this is the type species of the new genus. |
|||||||
Gen. nov. et Sp. nov. |
Valid |
John D. Scanlon |
Riverleigh World Heritage Property |
An Anseranatidae, this is the type species of the new genus. |
|||||
Gansugyps linxiaensis [71] |
Gen. nov. et Sp. nov. |
Valid |
Zhang Zihui Zheng Xiaoting Zheng Guangmei Hou Lianhai |
Late Miocene |
Upper Liushu Formation |
An Accipitridae, this is the type species of the new genus. |
|||
Heliadornis minor [65] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Pliocene |
MN 15-16 |
||||
Heliornis sumeghensis [60] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Miocene |
MN 11-12 |
||||
Gen. nov. et Sp. nov. |
Valid |
Zhang Fucheng Li Zhiheng |
A basal Ornithurae Haeckel, 1866, this is the type species of the new genus. |
||||||
Sp. nov. |
Valid |
An Enantiornithes Walker, 1981, Euenantiornithes Chiappe, 2002. |
|||||||
Sp. nov. |
Valid |
An Enantiornithes Walker, 1981, Euenantiornithes Chiappe, 2002. |
|||||||
Sp. nov. |
Valid |
An Enantiornithes Walker, 1981, Euenantiornithes Chiappe, 2002. |
|||||||
Megalocoturnix cordoni [59] |
Gen. nov. et Sp. nov. |
Valid |
Antonio Sánchez Marco |
Early Pliocene |
A Phasianidae, this is the type species of the new genus. |
||||
Sp. nov. |
Valid |
Federico L. Agnolin |
Late Miocene |
Andalhualá Formation |
A Phoenicopteriformes, Palaelodidae Stejneger, 1885. |
||||
Mergus minor [65] |
Sp. nov. |
Valid |
Jenö Kessler |
Middle Miocene |
MN 6-8 |
An Anatidae. |
|||
Miocepphus blowi [74] |
Gen. nov. et Sp. nov. |
Valid |
Erik Wijnker |
Late Miocene |
Breda Formation Mill |
USA: |
An Alcidae. |
||
Miocepphus bohaskai [74] |
Sp. nov. |
Valid |
Erik Wijnker |
Late Miocene |
Breda Formation Mill |
USA: |
An Alcidae. |
||
Miocepphus mergulellus [74] |
Sp. nov. |
Valid |
Erik Wijnker |
Late Miocene |
USA: |
An Alcidae. |
|||
Palaeocryptonyx novaki [59] |
Sp. nov. |
Valid |
Antonio Sánchez Marco |
Late Pliocene |
Villanyan, |
A Phasianidae. |
|||
Paracoracias occidentalis [75] |
Gen. nov. et Sp. nov. |
Valid |
Julia A. Clarke Daniel T. Ksepka N. Adam Smith |
USA: |
A stem Coraiiformes. |
||||
Pinpanetta fromensis [58] |
Sp. nov. |
Valid |
Late Oligocene |
Etadunna Formation |
An Anatidae. |
||||
Pinpanetta tedfordi [58] |
Gen. nov. et Sp. nov. |
Valid |
Late Oligocene |
Etadunna Formation |
An Anatidae, this is the type species of the new genus. |
||||
Pinpanetta vickersrichae [58] |
Sp. nov. |
Valid |
Late Oligocene |
Etadunna Formation |
An Anatidae. |
||||
Podiceps csarnotatus [65] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Pliocene |
MN 15-16 |
||||
Porzana kretzoii [60] |
Sp. nov. |
Valid |
Jenö Kessler |
Late Miocene |
A Rallidae. |
||||
Porzana matraensis [60] |
Sp. nov. |
Valid |
Jenö Kessler |
Middle Miocene |
MN 6-8 |
A Rallidae. |
|||
Primozygodactylus eunjooae [76] |
Sp. nov. |
Valid |
Nikita V. Zelenkov |
Middle Eocene |
A Zygodactylidae Brodkorb, 1971. |
||||
Pseudocepphus teres [74] |
Gen. nov. et Sp. nov. |
Valid |
Erik Wijnker |
Late Miocene |
USA: |
An Alcidae, this is the type species of the new genus. |
|||
Gen. nov. et Sp. nov. |
Valid |
Eric M. Morschhauser David J. Varricchio Gao Chunling Liu Jinyuan Wang Xuri Cheng Xiadong Meng Qingjin |
An Enantiornithes Walker, 1981, Longipterygidae Zhang, Zhou, Hou et Gu, 2000, this is the type species of the new genus. |
||||||
Gen. nov. et Sp. nov. |
Valid |
Suzanne J. Hand Jennifer P. Worthy Alan J. D. Tennyson R. Paul Scofield |
Early Miocene, Altonian |
Bannockburn Formation |
An Columbidae, this is the type species of the new genus. |
||||
Sapeornis angustis [79] |
Sp. nov. |
Valid |
Pauline Provini Zhang Fucheng |
A Sapeornithidae Zhou et Zhang, 2006. |
|||||
Selenornis steendorpensis [80] |
Sp. nov. |
Valid |
Early Oligocene, MP ?23-24 |
Boom Formation |
A Tytonidae, Selenornithinae Mourer-Chauviré, 1987. |
||||
Gen. nov. et Sp. nov. |
Valid |
Jingmai K. O'Connor Xuri Wang Chunling Gao Qingjin Meng Xiaodong Cheng Jinyuan Liu |
An Enantiornithes Walker, 1981, Familia Longipterygidae Zhang, Zhou, Hou et Gu, 2000, this is the type species of the new genus. |
|
|||||
Gen. nov. et Sp. nov. |
Valid |
USA: |
An Anatidae, Kaua'i Mole Duck, a Hawaiian duck that probably lived a kiwi-like lifestyle, this is the type species of the new genus. |
||||||
Tologuica aurorae [83] |
Gen. nov. et Sp. nov. |
Valid |
Nikita V. Zelenkov |
Middle Miocene |
Ööshin Formation |
A Phasianidae, this is the type species of the new genus. |
|||
Tologuica karhui [83] |
Sp. nov. |
Valid |
Nikita V. Zelenkov |
Middle Miocene |
Ööshin Formation |
A Phasianidae. |
Pterosaurs
- Lü, J. (2009). "A new non-pterodactyloid pterosaur from Qinglong County, Hebei Province of China". Acta Geologica Sinica (English Edition) 83 (2): 189–199. doi:10.1111/j.1755-6724.2009.00062.x.
- Vullo, R., and Neraudeau, D., 2009, Pterosaur remains from the Cenomanian (Late Cretaceous) Paralic Deposits of Charentes, Western France Journal of Vertebrate Paleontology, v. 29, n. 1, p. 277-282.
Newly named pterosaurs | |||||||
---|---|---|---|---|---|---|---|
Name | Status | Authors | Age | Unit | Location | Notes | Images |
Valid |
|
Late Triassic |
A campylognathoidid with a wingspan of about 70 cm. |
||||
Valid |
|
Middle Jurassic |
A primitive long-tailed pterosaur related to Dorygnathus. |
||||
Valid |
|
Early Cretaceous |
A pterodactyloid known from a juvenile specimen whose fossils preserved details of the flight membrane and fur. |
| |||
Valid |
|
Late Jurassic |
A primitive long tailed pterosaur. The type specimen shows evidence of the animal having broken its shin while alive. |
||||
See also
- 2010 in archosaur paleontology
- 2011 in archosaur paleontology
- 2012 in archosaur paleontology
- 2013 in archosaur paleontology
Notes
References
- ↑ Marinho, T.S.; and Carvalho, I.S. (2009). "An armadillo-like sphagesaurid crocodyliform from the Late Cretaceous of Brazil". Journal of South American Earth Sciences 27 (1): 36–41. Bibcode:2009JSAES..27...36M. doi:10.1016/j.jsames.2008.11.005.
- ↑ Juan Martín Leardi and Diego Pol (2009). "The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia". Cretaceous Research 30 (6): 1376–1386. doi:10.1016/j.cretres.2009.08.002.
- ↑ Magdalena Borsuk−Białynicka; and Andriej G. Sennikov (2009). "Archosauriform postcranial remains from the Early Triassic karst deposits of southern Poland" (PDF). Paleontologica Polonica 65: 283–328. Retrieved 13 August 2010.
- ↑ Kellner, A.W.A., Pinheiro, A.E.P., Azevedo, S.A.K., Henriques, D.D.R., de Carvalho, L.B., and Oliveira, G.R. (2009). "A new crocodyliform from the Alcântara Formation (Cenomanian), Cajual Island, Brazil". Zootaxa 2030: 49–58.
- ↑ Santiago, L.A.; and Andrés, L.A. (2009). "Nuevo género de Crocodylia del Eoceno medio de la Península Ibérica (Zamora, España): Duerosuchus piscator nov. gen., nov. sp". Studia Geologica Salmanticensia 45 (2): 149–173.
- ↑ Butler, R.J.; Barrett, P.M.; Abel, R.L. and Gower, D.J. (2009). "A Possible Ctenosauriscid Archosaur from the Middle Triassic Manda Beds of Tanzania". Journal of Vertebrate Paleontology 29 (4): 1022–1031. doi:10.1671/039.029.0404.
- 1 2 Sereno, P. C.; and Larsson, H. C. E. (2009). "Cretaceous crocodyliforms from the Sahara". ZooKeys 28 (2009): 1–143. doi:10.3897/zookeys.28.325.
- 1 2 Cau, Andrea; Maganuco, Simone (2009). "A new theropod dinosaur, represented by a single unusual caudal vertebra from the Kem Kem Beds (Cretaceous) of Morocco". Atti Soc. It. Sci. Nat. Museo civ. Stor. Nat. Milano 150 (II): 239–257.
- ↑ Lio, G., Agnolin, F., Cau, A. and Maganuco, S. (2012). "Crocodyliform affinities for Kemkemia auditorei Cau and Maganuco, 2009, from the Late Cretaceous of Morocco." Atti della Società Italiana di Scienze Naturali e del Museo di Storia Naturale di Milano, 153 (I), s. 119–126.
- ↑ Lauprasert, K.; Cuny, G.; Thirakhupt, K. and Suteethorn, V. 2009. Khoratosuchus jintasakuli gen. et sp. nov., an advanced neosuchian crocodyliform from the Early Cretaceous (Aptian-Albian) of NE Thailand. In E. Buffetaut, G. Cuny, J. Le Loeuff, V. Suteethorn (eds.), Late Palaeozoic and Mesozoic Ecosystems in SE Asia. The Geological Society of London, Special Publication 315:175-187.
- ↑ Erin L. Rasmusson Simons and Gregory A. Buckley (2009). "New Material of "Trematochampsa" Oblita (Crocodyliformes,Trematochampsidae) from the Late Cretaceous of Madagascar". Journal of Vertebrate Paleontology 29 (2): 599–604. doi:10.1671/039.029.0224.
- ↑ Iori, F.V.; and Carvalho, I.S. (2009). "Morrinhosuchus luziae, um novo Crocodylomorpha Notosuchia da Bacia Bauru, Brasil". Revista Brasileira de Geociências 39 (4): 717–725. Retrieved 7 August 2010.
- ↑ Shan, Hsi-yin; Wu, Xiao-chun; Cheng, Yen-nien; and Sato, Tamaki (2009). "A new tomistomine (Crocodylia) from the Miocene of Taiwan". Canadian Journal of Earth Sciences 46 (7): 529–555. Bibcode:2009CaJES..46..529S. doi:10.1139/E09-036. Retrieved 15 September 2010.
- ↑ Brusatte, Stephen L.; Butler, Richard J.; Sulej, Tomasz; Niedźwiedzki, Grzegorz (2009). "The taxonomy and anatomy of rauisuchian archosaurs from the Late Triassic of Germany and Poland" (PDF). Acta Palaeontologica Polonica 54 (2): 221–230. doi:10.4202/app.2008.0065. Retrieved 13 August 2010.
- ↑ Novas, F. E.; Pais, D. F.; Pol, D.; Carvalho, I. D. S.; Mones, A.; Scanferla, A.; and Riglos, M. S. (2009). "Bizarre notosuchian crocodyliform with associated eggs from the Upper Cretaceous of Bolivia". Journal of Vertebrate Paleontology 29 (4): 1316–1320. doi:10.1671/039.029.0409.
- ↑ Nesbitt, S.J., Turner, A.H., Spaulding, M., Conrad, J.L., and Norell, M.A. 2009. The theropod furcula. Journal of Morphology. doi:10.1002/jmor.10724.
- ↑ Barrett, P.M.; Han, F.-L. (2009). "Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China". Zootaxa 2072: 31–55.
- ↑ Olshevsky, George. "Dinogeorge's Dinosaur Genera List". Retrieved 2009-01-05.
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