New sauropodomorph and cynodont remains from the Late Triassic Sacisaurus site in southern Brazil and its stratigraphic position in the Norian Caturrita Formation

• Autorzy: Marsola J.C.A. , Bittencourt J.S. , Da Rosa A.A.S. , Martinelli A.G. , Ribeiro A.M. , Ferigolo J. , Langer M.C.
• Języki publikacji: EN

Abstrakty

EN

Sacisaurus agudoensis is the only silesaurid known from the Triassic beds of the Santa Maria Supersequence and the correlation of its type locality to the other Triassic deposits of south Brazil has always been controversial. In an attempt to improve this, a handful of dinosaur and cynodont remains found associated to S. agudoensis are here described and compared. The anatomy of the sauropodomorph is more similar to that of Norian forms such as Pantydraco caducus and Unaysaurus tolentinoi than to that of Carnian taxa such as Saturnalia tupiniquim and Pampadromaeus barberenai. The cynodonts recovered based on isolated teeth include a brasilodontid and a Riograndia-like form. This assemblage is consistent with a Norian age, as is also suggested by local stratigraphic correlation, which positions the site in the Caturrita Formation.

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2018
• Tom: 63
• Numer: 4
• Opis fizyczny: p.653-669,fig.,ref.

Twórcy

autor

Marsola J.C.A.

• Departamento de Biologia, FFCLRP, Universidade de Sao Paulo, Ribeirao Preto, SP, 14040-901, Brazil

autor

Bittencourt J.S.

• Departamento de Geologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil

autor

Da Rosa A.A.S.

• Laboratorio de Estratigrafia e Paleobiologia, Departamento de Geociencias, Universidade Federal de Santa Maria, Santa Maria, RS, 97.105-900, Brazil

autor

Martinelli A.G.

• Laboratorio de Paleontologia de Vertebrados, Departamento de Paleontologia e Estratigrafia, Instituto de Geociencias, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 91540-000, Brazil

autor

Ribeiro A.M.

• Secao de Paleontologia, Museu de Ciencias Naturais, Fundacao Zoobotanica do Rio Grande do Sul, Porto Alegre, RS, 90690-000, Brazil

autor

Ferigolo J.

• Secao de Paleontologia, Museu de Ciencias Naturais, Fundacao Zoobotanica do Rio Grande do Sul, Porto Alegre, RS, 90690-000, Brazil

autor

Langer M.C.

• Departamento de Biologia, FFCLRP, Universidade de Sao Paulo, Ribeirao Preto, SP, 14040-901, Brazil

Bibliografia

• Abdala, F., Barberena, M.C., and Dornelles, J. 2002. A new species of the traversodontid cynodont Exaeretodon from the Santa Maria Formation (Middle/Late Triassic) of southern Brazil. Journal of Vertebrate Paleontology 22: 313–325.
• Agnolín, F.F., and Rozadilla, S. 2017. Phylogenetic reassessment of Pisanosaurus mertii Casamiquela, 1967, a basal dinosauriform from the Late Triassic of Argentina. Journal of Systematic Palaeontology 16: 853–879.
• Andreis, R.R., Bossi, G.E., and Montardo, D.K. 1980. O Grupo Rosário do Sul (Triássico) no Rio Grande do Sul. Congresso Brasileiro de Geologia 31: 659–673.
• Apaldetti, C., Martínez, R.N., Cerda, I.A., Pol, D., and Alcober, O. 2018. An early trend towards gigantism in Triassic sauropodomorph dinosaurs. Nature Ecology & Evolution 2: 1–6.
• Apaldetti, C., Pol, D., and Yates, A. 2013. The postcranial anatomy of Coloradisaurus brevis (Dinosauria: Sauropodomorpha) from the Late Triassic of Argentina and its phylogenetic implications. Palaeontology 56: 277–301.
• Baron, M.G. 2017. Pisanosaurus mertii and the Triassic ornithischian crisis: could phylogeny offer a solution? Historical Biology: 1–15.
• Baron, M.G., Norman, D.B., and Barrett, P.M. 2017a. A new hypothesis of dinosaur relationships and early dinosaur evolution. Nature 543: 501–506.
• Baron, M.G., Norman, D.B., and Barrett, P.M. 2017b. Baron et al. reply. Nature 551: E4–E5.
• Baron, M.G., Norman, D.B., and Barrett, P.M. 2017c. Postcranial anatomy of Lesothosaurus diagnosticus (Dinosauria: Ornithischia) from the Lower Jurassic of southern Africa: implications for basal ornithischian taxonomy and systematics. Zoological Journal of the Linnean Society 179: 125–168.
• Barret, P.M. 2000. Prosauropod dinosaurs and iguanas: speculations on the diets of extinct reptiles. In: H.-D. Sues (ed.), Evolution of Herbivory in Terrestrial Vertebrates. Perspectives from the Fossil Record, 42–78. Cambridge University Press, London.
• Benson, R.B., Butler, R.J., Carrano, M.T., and O’Connor, P.M. 2012. Airfilled postcranial bones in theropod dinosaurs: physiological implications and the “reptile”-bird transition. Biological Reviews 87: 168–193.
• Benton, M.J., Forth, J., and Langer, M.C. 2014. Models for the rise of the dinosaurs. Current Biology 24: R87–R95.
• Benton, M.J., Juul, L., Storrs, G.W., and Galton, P.M. 2000. Anatomy and systematics of the prosauropod dinosaur Thecodontosaurus antiquus from the Upper Triassic of southwest England. Journal of Vertebrate Paleontology 20: 77–108.
• Bernardi, M., Gianolla, P., Petti, F.M., Mietto, P., and Benton, M.J. 2018. Dinosaur diversification linked with the Carnian Pluvial Episode. Nature Communications 9: 1–10.
• Bittencourt, J.S., and Kellner, A.W.A. 2009. The anatomy and phylogenetic position of the Triassic dinosaur Staurikosaurus pricei Colbert, 1970. Zootaxa 2079: e56.
• Bittencourt, J.S., Leal, L.A., Langer, M.C., and Azevedo, S.A. 2012. An additional basal sauropodomorph specimen from the Upper Triassic Caturrita Formation, southern Brazil, with comments on the biogeography of plateosaurids. Alcheringa 36: 269–278.
• Bonaparte, J.F., and Barberena, M.C. 2001. On two advanced carnivorous cynodonts from the Late Triassic of Southern Brazil. Bulletin of the Museum of Comparative Zoology 156: 59–80.
• Bonaparte, J.F., Ferigolo, J., and Ribeiro, A.M. 2001. A primitive Late Triassic “ictidosaur” from Rio Grande do Sul, Brazil. Palaeontology 44: 623–635.
• Bonaparte, J.F., Martinelli, A.G., and Schultz, C.L. 2005. New information on Brasilodon and Brasilitherium (Cynodontia, Probainognathia) from the Late Triassic of southern Brazil. Revista Brasileira de Paleontologia 8: 25–46.
• Bonaparte, J.F., Martinelli, A.G., Schultz, C.L., and Rubert. R. 2003. The sister group of mammals: small cynodonts from the Late Triassic of southern Brazil. Revista Brasileira de Paleontologia 5: 5–27.
• Bonaparte, J.F., Schultz, C.L., Soares M.B., and Martinelli, A. 2010. La fauna local de Faxinal do Soturno, Triásico Tardío de Rio Grande do Sul, Brazil. Revista Brasileira de Paleontologia 13: 1–14.
• Britt, B.B. 1993. Pneumatic Postcranial Bones in Dinosaurs and Other Archosaurs. 383 pp. Ph.D. Dissertation, University of Calgary, Calgary.
• Bronzati, M., Benson, R.B., and Rauhut, O.W. 2018. Rapid transformation in the braincase of sauropod dinosaurs: integrated evolution of the braincase and neck in early sauropods? Palaeontology 61: 289–302.
• Brusatte, S.L., Benton, M.J., Ruta, M., and Lloyd, G.T. 2008a. Superiority, competition, and opportunism in the evolutionary radiation of dinosaurs. Science 321: 1485–1488.
• Brusatte, S.L., Benton, M.J., Ruta, M., and Lloyd, G.T. 2008b. The first 50 Myr of dinosaur evolution: macroevolutionary pattern and morphological disparity. Biology Letters 23: 733–736.
• Butler, R.J. 2010. The anatomy of the basal ornithischian dinosaur Eocursor parvus from the lower Elliot Formation (Late Triassic) of South Africa. Zoological Journal of the Linnean Society 160: 648–684.
• Cabreira, S.F., Kellner, A.W.A., Dias-da-Silva, S., da Silva, L.R., Bronzati, M., Marsola, J.C.A., Müller, R.T., Bittencourt, J.S., Batista, B.J., Raugust, T., Carrilho, R., Brodt, A., and Langer, M.C. 2016. A unique Late Triassic dinosauromorph assemblage reveals dinosaur ancestral anatomy and diet. Current Biology 26: 3090–3095.
• Coddington, J. and Scharff, N. 1994. Problems with zero-length branches. Cladistics 10: 415–423.
• Cooper, M.R. 1981. The prosauropod Massospondylus carinatus Owen from Zimbabwe: its biology, mode of life and phylogenetic significance. Occasional Papers of the National Museums and Monuments 6: 689–840.
• Crompton, A.W. 1974. The dentitions and relationships of the southern African Triassic mammals, Erythrotherium parringtoni and Megazostrodon rudnerae. Bulletin of the British Museum (Natural History), Geology 24: 397–437.
• Currie, P.J., and Zhao, X.J. 1993. A new carnosaur (Dinosauria, Theropoda) from the Jurassic of Xinjiang, People’s Republic of China. Canadian Journal of Earth Sciences 30: 2037–2081.
• Da Rosa, Á.A.S. 2005. Paleoalterações em depósitos sedimentares de planícies aluviais do Triássico Médio a Superior do sul do Brasil: caracterização, análise estratigráfica e preservação fossilífera. 211 pp. Ph.D. Dissertation, Universidade do Vale dos Sinos, São Leopoldo.
• Da Rosa, Á. A. 2015. Geological context of the dinosauriform-bearing outcrops from the Triassic of Southern Brazil. Journal of South American Earth Sciences 61: 108–119.
• Dzik, J. 2003. A beaked herbivorous archosaur with dinosaur affinities from the early Late Triassic of Poland. Journal of Vertebrate Paleontology 23: 556–574.
• Ezcurra, M.D. 2010. A new early dinosaur (Saurischia: Sauropodomorpha) from the Late Triassic of Argentina: a reassessment of dinosaur origin and phylogeny. Journal of Systematic Palaeontology 8: 371–425.
• Ezcurra, M.D. 2016. The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms. PeerJ 4: e1778.
• Ferigolo, J. and Langer, M.C. 2007. A Late Triassic dinosauriform from south Brazil and the origin of the ornithischian predentary bone. Historical Biology 19: 23–33.
• Flynn, J.J., Parrish, M., Rakotosamimanana, B., Simpson, W.F., Whatley, R.L., and Wyss, A.R. 1999. A Triassic fauna from Madagascar, including early dinosaurs. Science 286: 763–765.
• Galton, P.M. and Kermack, D. 2010. The anatomy of Pantydraco caducus, a very basal sauropodomorph dinosaur from the Rhaetian (Upper Triassic) of South Wales, UK. Revue de Paléobiologie 29: 341–404.
• Goloboff, P.A. and Catalano, S.A. 2016. TNT version 1.5, including a full implementation of phylogenetic morphometrics. Cladistics 32: 221–238.
• Goloboff, P.A., Farris, J.S., and Nixon, K.C. 2008. TNT, a free program for phylogenetic analysis. Cladistics 24: 774–786.
• Griffin, C.T. 2018. Developmental patterns and variation among early theropods. Journal of Anatomy 232: 604–640.
• Griffin, C.T. and Nesbitt, S.J. 2016. The femoral ontogeny and long bone histology of the Middle Triassic (? late Anisian) dinosauriform Asilisaurus kongwe and implications for the growth of early dinosaurs. Journal of Vertebrate Paleontology 36: e1111224.
• Hendrickx, C. and Mateus, O. 2014. Abelisauridae (Dinosauria: Theropoda) from the Late Jurassic of Portugal and dentition-based phylogeny as a contribution for the identification of isolated theropod teeth. Zootaxa 3759: 1–74.
• Horn, B.L.D., Melo, T.M., Schultz, C.L., Philipp, R.P., Kloss, H.P., and Goldberg, K. 2014. A new third-order sequence stratigraphic framework applied to the Triassic of the Paraná Basin, Rio Grande do Sul, Brazil, based on structural, stratigraphic and paleontological data. Journal of South American Earth Sciences 55: 123–132.
• Hutchinson, J.R. 2001a. The evolution of femoral osteology and soft tissues on the line to extant birds (Neornithes). Zoological Journal of Linnean Society 131: 169–197.
• Hutchinson, J.R. 2001b. The evolution of pelvic osteology and soft tissues on the line to extant birds (Neornithes). Zoological Journal of the Linnean Society 131: 123–168.
• Irmis, R.B. 2007. Axial skeleton ontogeny in the Parasuchia (Archosauria: Pseudosuchia) and its implications for the ontogenetic determination in archosaurs. Journal of Vertebrate Paleontology 27:350–361.
• Irmis, R.B., Parker, W.G., Nesbitt, S.J., and Liu, J. 2007. Early ornithischian dinosaurs: the Triassic record. Historical Biology 19: 3–22.
• Langer, M.C. 2003. The pelvic and hind limb anatomy of the stem-sauropodomorph Saturnalia tupiniquim (Late Triassic, Brazil). PaleoBios 23: 1–40.
• Langer, M.C. 2004. Basal saurischia. The Dinosauria 2: 25–46.
• Langer, M.C. and Benton, M.J. 2006. Early dinosaurs: a phylogenetic study. Journal of Systematic Palaeontology 4: 309–358.
• Langer, M.C. and Ferigolo, J. 2013. The Late Triassic dinosauromorph Sacisaurus agudoensis (Caturrita Formation; Rio Grande do Sul, Brazil): anatomy and affinities. Geological Society, London, Special Publications 379: 353–392.
• Langer, M.C., Bittencourt, J.S., and Schultz, C.L. 2010. A reassessment of the basal dinosaur Guaibasaurus candelariensis, from the Late Triassic Caturrita Formation of south Brazil. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101: 301–332.
• Langer, M.C., Ezcurra, M.D., Rauhut, O.W.M., Benton, M.J., Knoll, F., McPhee, B.W., Novas, F.E., Pol, D., and Brusatte, S. 2017. Untangling the dinosaur family tree. Nature 551: E1–E5.
• Langer, M.C., Nesbitt, S.J., Bittencourt, J.S., and Irmis, R.B. 2013. Nondinosaurian Dinosauromorpha. Geological Society, London, Special Publications 379: 157–186.
• Langer, M.C., Ramezani, J., and Da Rosa, Á.A.S. 2018. U-Pb age constraints on dinosaur rise from south Brazil. Gondwana Research 57: 133–140.
• Langer, M.C., Ribeiro, A.M., Schultz, C.L., and Ferigolo, J. 2007. The continental tetrapod-bearing Triassic of south Brazil. New Mexico Museum of Natural History and Science Bulletin 41: 201–218.
• Marsicano, C.A., Irmis, R.B., Mancuso, A.C., Mundil, R., and Chemale, F. 2016. The precise temporal calibration of dinosaur origins. Proceedings of the National Academy of Sciences 113: 509–513.
• Marsola, J.C.A., Bittencourt, J.S., Butler, R.J., Da Rosa, Á.A.S., Sayão, J.M., and Langer, M.C. (in press). A new dinosaur with theropod affinities from the Late Triassic Santa Maria Formation, South Brazil. Journal of Vertebrate Paleontology.
• Martínez, R.N. 2009. Adeopapposaurus mognai, gen. et sp. nov. (Dinosauria: Sauropodomorpha), with comments on adaptations of basal Sauropodomorpha. Journal of Vertebrate Paleontology 29: 142–164.
• Martínez, R.N. and Alcober, O.A. 2009. A basal sauropodomorph (Dinosauria: Saurischia) from the Ischigualasto Formation (Triassic, Carnian) and the early evolution of Sauropodomorpha. PLoS One 4: e4397.
• Martínez, R.N., Sereno, P.C., Alcober, O.A., Colombi, C.E., Renne, P.R., Montañez, I.P., and Currie, B.S. 2011. A basal dinosaur from the dawn of the dinosaur era in southwestern Pangaea. Science 331: 206–210.
• Martinelli, A.G., Eltink, E., Da-Rosa, Á.A.S., and Langer, M.C. 2017a. A new cynodont (Therapsida) from the Hyperodapedon Assemblage Zone (upper Carnian–Norian) of southern Brazil improves the Late Triassic probainognathian diversity. Papers in Palaeontology 3: 401–423.
• Martinelli, A.G., Soares, M.B., Oliveira, T.V., Rodrigues, P.G., and Schultz. C.L. 2017b. The Triassic eucynodont Candelariodon barberenai revisited and the early diversity of stem prozostrodontians. Acta Palaeontologica Polonica 62: 527–542.
• Martinelli, A.G., Soares, M.B., Rodrigues, P., and Schultz, C.L. 2016. The oldest ictidosaur cynodont (Therapsida) from the late Carnian of southern Brazil and its implication in probainognathian evolution. In: O.N. Grillo, P.S.R. Romano, and G.R. Oliveira (eds.), X Simpósio Brasileiro de Paleontologia de Vertebrados, Rio de Janeiro. Boletim de Resumos, 111. Sociedade Brasileira de Paleontologia, Rio de Janeiro.
• Müller, R.T., Langer, M.C., Bronzati, M., Pacheco, C.P., Cabreira, S.F., and Dias-Da-Silva, S. 2018. Early evolution of sauropodomorphs: anatomy and phylogenetic relationships of a remarkably well-preserved dinosaur from the Upper Triassic of southern Brazil. Zoological Journal of the Linnean Society: 1–62.
• Nesbitt, S.J. 2005. Osteology of the Middle Triassic pseudosuchian archosaur Arizonasaurus babbitti. Historical Biology 17: 19–47.
• Nesbitt, S.J. 2007. The anatomy of Effigia okeeffeae (Archosauria, Suchia), theropod-like convergence, and the distribution of related taxa. Bulletin of the American Museum of Natural History 302: 1–84.
• Nesbitt, S J. 2011. The early evolution of archosaurs: relationships and the origin of major clades. Bulletin of the American Museum of Natural History 352: 1–292.
• Nesbitt, S.J., Sidor, C.A., Irmis, R.B., Angielczyk, K.D., Smith, R.M.H., and Tsuji, L.A. 2010. Ecologically distinct dinosaurian sister-group shows early diversification of Ornithodira. Nature 464: 95–98.
• Novas, F.E. 1994. New information on the systematics and postcranial skeleton of Herrerasaurus ischigualastensis (Theropoda: Herrerasauridae) from the Ischigualasto Formation (Upper Triassic) of Argentina. Journal of Vertebrate Paleontology 13: 400–423.
• Pacheco, C.P., Martinelli, A.G., Pavanatto, A.E.B., Soares, M.B, and Diasda-Silva, S. 2018. Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy. Historical Biology 30: 475–485.
• O’Connor, P.M. 2006. Postcranial pneumaticity: An evaluation of soft-tissue influences on the postcranial skeleton and the reconstruction of pulmonary anatomy in archosaurs. Journal of Morphology 267: 1199–1226.
• O’Connor, P.M. 2007. The postcranial axial skeleton of Majungasaurus crenatissimus (Theropoda: Abelisauridae) from the Late Cretaceous of Madagascar. Journal of Vertebrate Paleontology 27: 127–162.
• Parker, W.G., R.B. Irmis, S.J. Nesbitt, J.W. Martz, and L.S. Browne. 2005. The Late Triassic pseudosuchian Revueltosaurus callenderi and its implications for the diversity of early ornithischian dinosaurs. Proceedings of the Royal Society of London B 272: 963–969.
• Pol, D., Garrido, A., and Cerda, I.A. 2011. A new sauropodomorph dinosaur from the Early Jurassic of Patagonia and the origin and evolution of the sauropod-type sacrum. PLoS ONE 6: e14572.
• Porro, L.B., Witmer, L.M., and Barrett, P.M. 2015. Digital preparation and osteology of the skull of Lesothosaurus diagnosticus (Ornithischia: Dinosauria). PeerJ 3: e1494.
• Pretto, F.A., Schultz, C.L., and Langer, M.C. 2015. New dinosaur remains from the Late Triassic of southern Brazil (Candelária Sequence, Hyperodapedon Assemblage Zone). Alcheringa 39: 264–273.
• Pretto, F.A., Langer, M.C., and Schultz, C.L. 2018. A new dinosaur (Saurischia: Sauropodomorpha) from the Late Triassic of Brazil provides insights on the evolution of sauropodomorph body plan. Zoological Journal of the Linnean Society: 1–29.
• Prieto-Márquez, A. and Norell, M.A. 2011. Redescription of a nearly complete skull of Plateosaurus (Dinosauria: Sauropodomorpha) from the Late Triassic of Trossingen (Germany). American Museum Novitates 3727: 58.
• Ribeiro, A.M., Abdala, F., and Bertoni, R.S. 2011. Traversodontid cynodonts (Therapsida–Eucynodontia) from two Upper Triassic localities of the Paraná Basin, southern Brazil. Ameghiniana 48 (Supplement): R111.
• Raath, M.A. 1977. The Anatomy of the Triassic theropod Syntarsus rhodesiensis (Saurischia: Podokesauridae) and Considerations of Its Biology. 233 pp. Ph.D. Dissertation, Rhodes University, Salisbury.
• Rauhut, O.W.M. 2003. The interrelationships and evolution of basal theropod dinosaurs. Special Papers in Palaeontology 69: 1–215.
• Rauhut, O.W.M. and Carrano, M.T. 2016. The theropod dinosaur Elaphrosaurus bambergi, from the Late Jurassic of Tendaguru, Tanzania. Zoological Journal of the Linnean Society 178: 546–610.
• Rinehart, L.F., Lucas, S.G., Heckert, A.B., Spielmann, J.A., and Celeskey, M.D. 2009. The Paleobiology of Coelophysis bauri (Cope) from the Upper Triassic (Apachean) Whitaker quarry, New Mexico, with detailed analysis of a single quarry block. New Mexico Museum of Natural History and Science Bulletin 45: 1–260.
• Rowe, T.B., Sues, H.D., and Reisz, R.R. 2011. Dispersal and diversity in the earliest North American sauropodomorph dinosaurs, with a description of a new taxon. Proceedings of the Royal Society of London B 278: 1044–1053.
• Sereno, P.C. and Novas, F.E. 1993. The skull and neck of the basal theropod Herrerasaurus ischigualastensis. Journal of Vertebrate Paleontology 13: 451–476.
• Sereno, P.C., Forster, C.A., Rogers, R.R., and Monetta, A.M. 1993. Primitive dinosaur skeleton from Argentina and the early evolution of Dinosauria. Nature 361: 64–66.
• Sereno, P.C., Martínez, R.N., and Alcober, O.A. 2012. Osteology of Eoraptor lunensis (Dinosauria, Sauropodomorpha). Journal of Vertebrate Paleontology 32: 83–179.
• Soares, M.B., Martinelli, A.G., and Oliveira, T.V. 2014. A new prozostrodontian cynodont (Therapsida) from the Late Triassic Riograndia Assemblage Zone (Santa Maria Supersequence) of Southern Brazil. Anais da Academia Brasileira de Ciências 86: 1673–1691.
• Soares, M.B., Schultz, C.L., and Horn, B.L.D. 2011. New information on Riograndia guaibensis Bonaparte, Ferigolo and Ribeiro, 2001 (Eucynodontia, Tritheledontidae) from the Late Triassic of southern Brazil: anatomical and biostratigraphic implications. Anais da Academia Brasileira de Ciências 83: 329–354.
• Sookias, R.B., Butler, R.J., and Benson, R.B.J. 2012. Rise of dinosaurs reveals major body-size transitions are driven by passive processes of trait evolution. Proceedings of the Royal Society of London B 279: 2180–2187.
• Tykoski, R.S. 2005. Anatomy, Ontogeny, and Phylogeny of Coelophysoid Theropods. 553 pp. Ph.D. Dissertation, The University of Texas at Austin, Austin.
• Wedel, M.J. 2007. What pneumaticity tells us about “prosauropods”, and vice versa. Special Papers in Palaeontology 77: 207–222.
• Welles, S.P. 1984. Dilophosaurus wetherilli (Dinosauria, Theropoda). Osteology and comparisons. Palaeontographica Abteilung A 4–6: 85–180.
• Whiteside, J.H., Lindström, S., Irmis, R.B., Glasspool, I.J., Schaller, M.F., Dunlavey, M., Nesbitt, S.J., Smith, N.D., and Turner, A.H. 2015. Extreme ecosystem instability suppressed tropical dinosaur dominance for 30 million years. Proceedings of the National Academy of Sciences 112: 7909–7913.
• Wilson, J.A. 1999. A nomenclature for vertebral laminae in sauropods and other saurischian dinosaurs. Journal of Vertebrate Paleontology 19: 639–653.
• Wilson, J.A. 2012. New vertebral laminae and patterns of serial variation in vertebral laminae of sauropod dinosaurs. Contributions from the Museum of Paleontology, University of Michigan 32: 91–110.
• Wilson, J.A., Michael, D.D., Ikejiri, T., Moacdieh, E.M., and Whitlock, J.A. 2011. A nomenclature for vertebral fossae in sauropods and other saurischian dinosaurs. PLoS One 6: e17114.
• Yates, A.M. 2003. A new species of the primitive dinosaur Thecodontosaurus (Saurischia: Sauropodomorpha) and its implications for the systematics of early dinosaurs. Journal of Systematic Palaeontology 1: 1–42.

Identyfikatory

DOI

10.4202/app.00492.2018