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Redescription of the archosaur Parringtonia gracilis from the Middle Triassic Manda beds of Tanzania, and the antiquity of Erpetosuchidae

Published online by Cambridge University Press:  30 August 2012

STERLING J. NESBITT  and
RICHARD J. BUTLER
STERLING J. NESBITT*
Affiliation:
Burke Museum and Department of Biology, University of Washington, Seattle, Washington 98195, USA
RICHARD J. BUTLER
Affiliation:
GeoBio-Centre, Ludwig-Maximilians-Universität München, Richard-Wagner-Str. 10, 80333 Munich, Germany
*
†Author for correspondence: [email protected]
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Abstract

Parringtonia gracilis Huene, 1939 is represented by both cranial and postcranial material collected from the lower Middle Triassic (Anisian) Lifua Member of the Manda beds in southwestern Tanzania. This aberrant taxon was previously proposed to have affinities with pseudosuchian archosaurs, and specifically with the enigmatic Erpetosuchus granti from the Upper Triassic of Scotland. Here, we confirm the close affinities of Parringtonia gracilis and Erpetosuchus granti based on the following unambiguous synapomorphies: mediolaterally expanded posterior portion of the maxilla, alveoli present only in the anterior half of the maxilla, and absence of tooth serrations. Furthermore, the two taxa share osteoderms with deep sculpturing, a deep fossa on the dorsal margin of the neural spines and a heavily waisted shaft of the scapula. We added both Parringtonia gracilis and Erpetosuchus granti into a comprehensive phylogenetic analysis of early archosaurs and found that these taxa are clearly referable to Archosauria but that relationships are poorly resolved at the base of this clade. However, our analysis demonstrates that Erpetosuchus granti is not closely related to Crocodylomorpha, as has been hypothesized previously. The Erpetosuchidae are a clade of small-bodied archosaurs that have a poor fossil record but have members from both northern and southern Pangaea, ranging temporally from the Middle to Late Triassic. Thus, Erpetosuchidae is part of the early archosaurian radiation.

Keywords

archosaurphylogenyarchosaur radiationLifua Member
Type
Original Articles
Information
Geological Magazine , Volume 150 , Issue 2 , March 2013 , pp. 225 - 238
Copyright
Copyright © Cambridge University Press 2012

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References

Adams, E. N. 1972. Consensus techniques and the comparison of taxonomic trees. Systematic Zoology 21, 390–7.Google Scholar
Abdala, F., Hancox, P. J. & Neveling, J. 2005. Cynodonts from the uppermost Burgersdorp Formation, South Africa, and their bearing on the biostratigraphy and correlation of the Triassic Cynognathus Assemblage Zone. Journal of Vertebrate Paleontology 25, 192–7.Google Scholar
Attridge, J., Ball, H. W., Charig, A. & Cox, C. B. 1964. The British Museum (Natural History)–University of London Joint Palaeontological Expedition to Northern Rhodesia and Tanganyika. Nature 201, 445–9.Google Scholar
Benton, M. J. 1983. Dinosaur success in the Triassic; a noncompetitive ecological model. The Quarterly Review of Biology 58, 29–55.Google Scholar
Benton, M. J. 1994. Late Triassic to Middle Jurassic extinctions among continental tetrapods: testing the pattern. In In the Shadow of the Dinosaurs (eds Fraser, N. C. & Sues, H.-D.), pp. 366–97. Cambridge: Cambridge University Press.Google Scholar
Benton, M. J. & Gower, D. J. 1997. Richard Owen's giant Triassic frogs: Middle Triassic archosaurs from England. Journal of Vertebrate Paleontology 17, 74–88.Google Scholar
Benton, M. J. & Walker, A. D. 1981. The use of flexible synthetic rubbers for casts of complex fossils from natural moulds. Geological Magazine 118, 551–6.CrossRefGoogle Scholar
Benton, M. J. & Walker, A. D. 1985. Palaeoecology, taphonomy, and dating of Permo-Triassic reptiles from Elgin, north-east Scotland. Palaeontology 28, 207–34.Google Scholar
Benton, M. J. & Walker, A. D. 2002. Erpetosuchus, a crocodile-like basal archosaur from the Late Triassic of Elgin, Scotland. Biological Journal of the Linnean Society 136, 25–47.Google Scholar
Brochu, C. A. 1996. Closure of neurocentral sutures during crocodilian ontogeny: implications for maturity assessment in fossil archosaurs. Journal of Vertebrate Paleontology 16, 49–62.Google Scholar
Brusatte, S. L., Benton, M. J., Desojo, J. B. & Langer, M. C. 2010a. The higher-level phylogeny of Archosauria (Tetrapoda: Diapsida). Journal of Systematic Palaeontology 8, 3–47.CrossRefGoogle Scholar
Brusatte, S. L., Benton, M. J., Ruta, M. & Lloyd, F. T. 2008. Superiority, competition, and opportunism in the evolutionary radiation of dinosaurs. Science 321, 1485–8.Google Scholar
Brusatte, S., Nesbitt, S. J., Irmis, R. B., Butler, R., Benton, M. J. & Norell, M. A. 2010b. The origin and early radiation of dinosaurs. Earth-Science Reviews 101, 68–100.Google Scholar
Butler, R. J., Barrett, P. M., Abel, R. L. & Gower, D. J. 2009. A possible ctenosauriscid archosaur from the Middle Triassic Manda Beds of Tanzania. Journal of Vertebrate Paleontology 29, 1022–31.Google Scholar
Butler, R. J., Brusatte, S. L., Reich, M., Nesbitt, S. J., Schoch, R. R. & Hornung, J. J. 2011. The sail-backed reptile Ctenosauriscus from the latest Early Triassic of Germany and the timing and biogeography of the early archosaur radiation. PLoS ONE 6, e25693.Google Scholar
Carroll, R. L. 1988. Vertebrate Paleontology and Evolution. New York: W. H. Freeman.Google Scholar
Catuneanu, O., Wopfner, H., Eriksson, P. G., Cairncross, B., Rubidge, B. S., Smith, R. M. H. & Hancox, P. J. 2005. The Karoo basins of south-central Africa. Journal of African Earth Sciences 43, 211–53.Google Scholar
Charig, A. J. 1957. New Triassic archosaurs from Tanganyika including Mandasuchus and Teleocrater. Abstracts of Dissertations of the University of Cambridge 1955–56, 28–9.Google Scholar
Chatterjee, S. 1985. Postosuchus, a new thecodontian reptile from the Triassic of Texas and the origin of tyrannosaurs. Philosophical Transactions of the Royal Society of London B 309, 395–460.Google Scholar
Clark, J. M., Sues, H.-D. & Berman, D. S. 2000. A new specimen of Hesperosuchus agilis from the Upper Triassic of New Mexico and the interrelationships of basal crocodylomorph archosaurs. Journal of Vertebrate Paleontology 20, 683–704.Google Scholar
Cope, E. D. 1869. Synopsis of the extinct Batrachia, Reptilia and Aves of North America. Transactions of the American Philosophical Society, New Series 14, 1–252.Google Scholar
Fraas, O. 1867. Dyoplax arenaceus, ein neuer Stuttgarter Keuper-Saurier. Jahreshefte des Vereins für vaterländische Naturkunde in Württemberg 23, 108–12.Google Scholar
Fraas, O. 1877. Aëtosaurus ferratus Fr. Die gepanzerte Vogel-Escheaus dem Stubensandstein bei Stuttgart. Württembergische naturwissenschaftliche Jahreshefte 33, 1–22.Google Scholar
Gay, S. A. & Cruickshank, A. R. I. 1999. Biostratigraphy of the Permian tetrapod faunas from the Ruhuhu Valley, Tanzania. Journal of African Earth Sciences 29, 195–210.CrossRefGoogle Scholar
Gebauer, E. V. I. 2004. Neubeschreibung von Stagonosuchus nyassicus v. Huene, 1938 (Thecodontia, Rauisuchia) from the Manda Formation (Middle Triassic) of southwest Tanzania. Neues Jahrbuch für Geologie und Paläeontologie, Abhandlungen 231, 1–35.Google Scholar
Gower, D. J. & Schoch, R. 2009. Postcranial anatomy of the rauisuchian archosaur Batrachotomus kupferzellensis . Journal of Vertebrate Paleontology 29, 103–22.Google Scholar
Gower, D. J. & Sennikov, A. G. 2000. Early archosaurs from Russia. In The Age of Dinosaurs in Russia and Mongolia (eds Benton, M. J., Shishkin, M. A., Unwin, D. M. & Kurochkin, E. N.), pp. 140–59. New York: Cambridge University Press.Google Scholar
Hancox, P. J. 2000. The continental Triassic of South Africa. Zentralblatt für Geologie und Paläontologie Teil I, Heft 11–12 1998, 1285–324.Google Scholar
Haughton, S. H. 1932. On a collection of Karroo vertebrates from Tanganyika Territory. The Quarterly Journal of the Geological Society of London 88, 634–71.Google Scholar
Huene, F. V. 1902. Übersicht über die Reptilien der Trias. Geologische und Paläontologische Abhandlungen 6, 1–84.Google Scholar
Huene, F. V. 1938. Ein grosser Stagonolepide aus der jüngeren Trias Ostafrikas. Neues Jahrbuch für Geologie und Paläeontologie, Beilage-Bände Abteilung B 80, 264–78.Google Scholar
Huene, F. V. 1939. Ein kleiner Pseudosuchier und ein Saurischier aus den ostafrikanischen Mandaschichten. Neues Jahrbuch für Geologie und Paläeontologie, Beilage-Bände Abteilung B 81, 61–9.Google Scholar
Huxley, T. H. 1877. The crocodilian remains found in the Elgin sandstones, with remarks on ichnites of Cummingstone. Memoirs of the Geological Survey of the United Kingdom Monograph III, 1–51.Google Scholar
Irmis, R. B. 2007. Axial skeleton ontogeny in the parasuchia (Archosauria: Pseudosuchia) and its implications for ontogenetic determination in archosaurs. Journal of Vertebrate Paleontology 27, 350–61.Google Scholar
Kozer, H. W. & Bachmann, G. H. 2010. The Middle Carnian wet intermezzo of the Stuttgart Formation (Schilfsandstein), Germanic Basin. Palaeogeography, Palaeoclimatology, Palaeoeocology 290, 107–19.Google Scholar
Krebs, B. 1965. Die Triasfauna der Tessiner Kalkalpen. XIX. Ticinosuchus ferox, nov. gen. nov. sp. Ein neuer Pseudosuchier aus der Trias des Monte San Georgio. Schweizersiche Palaontologische, Abhandlungen 81, 1–140.Google Scholar
Krebs, B. 1976. Pseudosuchia. In Handbuch der Paläoherpetologie, 13 (ed. Kuhn, O.), pp. 40–98. Stuttgart: Gustav Fischer.Google Scholar
Langer, M. C., Ezcurra, M. D., Bittencourt, J. S. & Novas, F. E. 2010. The origin and early evolution of dinosaurs. Biological Reviews 85, 55–110.Google Scholar
Laurenti, J. N. 1768. Specimen Medicum, Exhibens Synopsin reptilium Emendatam cum Experimentis circa Venena et Antidota Reptilium Austriacorum. Vienna: J. T. N. de Trattnern.Google Scholar
Linnaeus, C. 1758. Systema Naturae per Raegna Tria Naturae . Volume 1. Regnum Animale. 10th [photographic facsimile] ed. London: Trustees, British Museum (Natural History).Google Scholar
Lucas, S. G., Wild, R. & Hunt, A. P. 1998. Dyoplax O. Fraas, a Triassic sphenosuchian from Germany. Stuttgarter Beiträge zur Naturkunde Serie B (Geologie und Paläontologie) 263, 1–13.Google Scholar
McGregor, J. H. 1906. The Phytosauria, with especial reference to Mystriosuchus and Rhytidodon . Memoirs of the American Museum of Natural History 9, 29–101.Google Scholar
Modesto, S. P. & Sues, H.-D. 2004. The skull of the Early Triassic archosauromorph Prolacerta broomi and its phylogenetic significance. Zoological Journal of the Linnean Society 140, 335–51.Google Scholar
Mundil, R., Palfy, J., Renne, P. R. & Brack, P. 2010. The Triassic timescale: a review of geochronological constraints. In The Triassic Timescale (ed. Lucas, S. G.), pp. 41–59. Geological Society of London, Special Publication no 334.Google Scholar
Nesbitt, S. J. 2003. Arizonasaurus and its implications for archosaur divergences. Proceedings of the Royal Society of London, B 270 (S2), S234–S237.Google Scholar
Nesbitt, S. J. 2005. The osteology of the Middle Triassic pseudosuchian archosaur Arizonasaurus babbitti . Historical Biology 17, 19–47.Google Scholar
Nesbitt, S. J. 2011. The early evolution of Archosauria: relationships and the origin of major clades. Bulletin of the American Museum of Natural History 352, 1–292.Google Scholar
Nesbitt, S. J., Liu, J. & Li, C. 2011. A sail-backed suchian from the Heshanggou Formation (Early Triassic: Olenekian) of China. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101, 271–84.Google Scholar
Nesbitt, S. J., Sidor, C. A., Irmis, R. B., Angielczyk, K. D., Smith, R. M. H. & Tsuji, L. A. 2010. Ecologically distinct dinosaurian sister-group shows early diversification of Ornithodira. Nature 464, 95–8.Google Scholar
Newton, E. T. 1894. Reptiles from the Elgin sandstone – description of two new genera. Philosophical Transactions of the Royal Society of London B 185, 573–607.Google Scholar
Nowack, E. 1937. Zur Kenntnis der Karruformation im Ruhuhu-Graben (D.O.A.). Neues Jahrbuch fur Mineralogie, Geologie und Palaontologie, Beilage-Band Abteilung B 78, 380–412.Google Scholar
Olsen, P. E., Sues, H.-D. & Norell, M. A. 2000. First record of Erpetosuchus (Reptilia: Archosauria) from the Late Triassic of North America. Journal of Vertebrate Paleontology 20, 633–6.Google Scholar
Parker, W. G. 2008. Description of new material of the aetosaur Desmatosuchus spurensis (Archosauria: Suchia) from the Chinle Formation of Arizona and a revision of the genus Desmatosuchus . PaleoBios 28, 1–40.Google Scholar
Romer, A. S. 1966. Vertebrate Paleontology, 3rd ed. Chicago: University of Chicago Press.Google Scholar
Sen, K. 2005. A new rauisuchian archosaur from the Middle Triassic of India. Palaeontology 48, 185–96.Google Scholar
Sidor, C. A., Angielczyk, J., Hopson, J., Nesbitt, S. J. & Smith, R. 2008. New vertebrate fossils from the Permo-Triassic Ruhuhu Basin of Tanzania. Journal of Vertebrate Paleontology 28 (supplement 003), 142A–143A.Google Scholar
Stockley, G. M. 1932. The geology of the Ruhuhu coalfields, Tanganyika Territory. The Quarterly Journal of the Geological Society of London 88, 610–22.Google Scholar
Sues, H.-D., Olsen, P. E., Carter, J. G. & Scott, D. M. 2003. A new crocodylomorph archosaur from the Upper Triassic of North Carolina. Journal of Vertebrate Paleontology 23, 329–43.Google Scholar
Walker, A. D. 1961. Triassic reptiles from the Elgin area: Stagonolepis, Dasygnathus, and their allies. Philosophical Transactions of the Royal Society of London 244, 103–204.Google Scholar
Walker, A. D. 1968. Protosuchus, Proterochampsa, and the origin of phytosaurs and crocodiles. Geological Magazine 105, 1–14.Google Scholar
Walker, A. D. 1970. A revision of the Jurassic reptile Hallopus victor (Marsh), with remarks on the classification of crocodiles. Philosophical Transactions of the Royal Society of London B 257, 323–72.Google Scholar
Watson, D. M. S. 1917. A sketch-classification of the pre-Jurassic tetrapod vertebrates. Proceedings of the Zoological Society, London 1917, 167–86.Google Scholar
Wilkinson, M. 2001. REDCON 3.0. Software and documentation. London: The Department of Zoology, Natural History Museum. (www.nhm.ac.uk/research-curation/projects/software/mwphylogeny.html)Google Scholar
Wilkinson, M. 2003. Missing entries and multiple trees: instability, relationships and support in parsimony analysis. Journal of Vertebrate Paleontology 23, 311–23.Google Scholar
Wu, X.-C. & Chatterjee, S. 1993. Dibothrosuchus elaphros, a crocodylomorph from the Lower Jurassic of China and the phylogeny of the Sphenosuchia. Journal of Vertebrate Paleontology 13, 58–89.CrossRefGoogle Scholar
Zhang, F. K. 1975. A new thecodont Lotosaurus, from the Middle Triassic of Hunan. Vertebrata Palasiatica 13, 144–7.Google Scholar
Zittel, K. A. 1890. Handbuch der Palaeontologie. I. Abtheilung Palaeozoologie. III Band. Vertebrata (Pisces, Amphibia, Reptilia, Aves). Munchen: Munchen and Leipzig.Google Scholar