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A partial lower jaw of a tetrapod from “Romer's Gap”

Published online by Cambridge University Press:  13 July 2018

Donglei Chen ,
Yasaman Alavi ,
Martin D. Brazeau ,
Henning Blom ,
David Millward  and
Per E. Ahlberg
Donglei Chen
Affiliation:
Department of Organismal Biology, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden.
Yasaman Alavi
Affiliation:
School of BioSciences, University of Melbourne, Parkville, Victoria 3010, Australia.
Martin D. Brazeau
Affiliation:
Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot SL5 7PY, UK.
Henning Blom
Affiliation:
Department of Organismal Biology, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden.
David Millward
Affiliation:
British Geological Survey, The Lyell Centre, Research Avenue South, Edinburgh EH14 4AP, UK.
Per E. Ahlberg
Affiliation:
Department of Organismal Biology, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden.
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Abstract

The first half of the Mississippian or Early Carboniferous (Tournaisian to mid- Viséan), an interval of about 20 million years, has become known as “Romer's Gap” because of its poor tetrapod record. Recent discoveries emphasise the differences between pre-“Gap” Devonian tetrapods, unambiguous stem-group members retaining numerous “fish” characters indicative of an at least partially aquatic lifestyle, and post-“Gap” Carboniferous tetrapods, which are far more diverse and include fully terrestrial representatives of the main crown-group lineages. It seems that “Romer's Gap” coincided with the cladogenetic events leading to the origin of the tetrapod crown group. Here, we describe a partial right lower jaw ramus of a tetrapod from the late Tournaisian or early Viséan of Scotland. The large and robust jaw displays a distinctive character combination, including a significant mesial lamina of the strongly sculptured angular, an open sulcus for the mandibular lateral line, a non-ossified narrow Meckelian exposure, a well-defined dorsal longitudinal denticle ridge on the prearticular, and a mesially open adductor fossa. A phylogenetic analysis places this specimen in a trichotomy with Crassigyrinus and baphetids + higher tetrapods in the upper part of the tetrapod stem group, above Whatcheeria, Pederpes, Ossinodus, Sigournea and Greererpeton. It represents a small but significant step in the gradual closure of “Romer's Gap”.

Keywords

Early CarboniferousfossilpalaeontologyTantallon Castle
Type
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Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 108 , Issue 1: A Legacy in Fossils: a Tribute to Stan Wood , March 2017 , pp. 55 - 65
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Copyright © The Royal Society of Edinburgh 2018 

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References

9. References

Ahlberg, P. E. 1991. Tetrapod or near-tetrapod fossils from the Upper Devonian of Scotland. Nature 354, 298–301.Google Scholar
Ahlberg, P. E. 1995. Elginerpeton pancheni and the earliest tetrapod clade. Nature 373, 420–425.Google Scholar
Ahlberg, P. E. 1998. Postcranial stem tetrapod remains from the Devonian of Scat Craig, Morayshire, Scotland. Zoological Journal of the Linnean Society 122, 99–141.Google Scholar
Ahlberg, P. E., Clack, J. A. & Blom, H. 2005a. The axial skeleton of the Devonian tetrapod Ichthyostega. Nature 437, 137–140.Google Scholar
Ahlberg, P. E., Friedman, M. & Blom, H. 2005b. New light on the earliest known tetrapod jaw. Journal of Vertebrate Paleontology 25, 720–724.Google Scholar
Ahlberg, P. E., Lukševičs, E. & Lebedev, O. 1994. The first tetrapod finds from the Devonian (Upper Famennian) of Latvia. Philosophical Transactions of the Royal Society, London, Series B 343, 303–328.Google Scholar
Ahlberg, P. E., Lukševičs, E., Blom, H. & Zupiņš, I. 2008. Ventastega curonica and the origin of tetrapod morphology. Nature 453, 1199–1204.Google Scholar
Ahlberg, P. E. & Clack, J. A. 1998. Lower jaws, lower tetrapods – a review based on the Devonian genus Acanthostega. Transactions of the Royal Society of Edinburgh: Earth Sciences 89, 11–46.Google Scholar
Anderson, J. S., Smithson, T., Mansky, C. F., Meyer, T. & Clack, J. 2015. A diverse tetrapod fauna at the base of ‘Romer's Gap'. PLoS ONE 10, e0125446.Google Scholar
Beaumont, E. H. 1977. Cranial morphology of the Loxommatidae (Amphibia: Labyrinthodonta). Philosophical Transactions of the Royal Society, London, Series B 280, 29–101.Google Scholar
Boisvert, C. A., Mark-Kurik, E. & Ahlberg, P. E. 2008. The pectoral fin of Panderichthys and the origin of digits. Nature 456, 636–638.Google Scholar
Bolt, J. R. & Lombard, R. E. 2001. The mandible of the primitive tetrapod Greererpeton, and the early evolution of the tetrapod lower jaw. Journal of Paleontology 75, 1016–1042.Google Scholar
Bolt, J. R. & Lombard, R. E. 2006. Signournea multidentata, a new primitive amphibian from the Upper Mississippian of Iowa, USA. Journal of Paleontology 80, 717–725.Google Scholar
Brazeau, M. D. 2005. A new genus of rhizodontid (Sarcopterygii, Tetrapodomorpha) from the Lower Carboniferous Horton Bluff Formation of Nova Scotia, and the evolution of the lower jaws in this group. Canadian Journal of Earth Sciences 42, 1481–1499.Google Scholar
Brazeau, M. D. & Ahlberg, P. E. 2006. Tetrapod-like middle ear architecture in a Devonian fish. Nature 439, 318–321.Google Scholar
Callier, V., Clack, J. A. & Ahlberg, P. E. 2009. Contrasting developmental trajectories in the earliest known tetrapod forelimbs. Science 324, 364–367.Google Scholar
Clack, J. A. 1987. Pholiderpeton scutigerum Huxley, and amphibian from the Yorkshire Coal Measures. Philosophical Transactions of the Royal Society, London, Series B 318, 1–107.Google Scholar
Clack, J. A. 1994a. Acanthostega gunnari, a Devonian tetrapod from Greenland; the snout, palate and ventral parts of the braincase, with a discussion of their significance. Meddelelser om Grønland, Geoscience 31, 1–24.Google Scholar
Clack, J. A. 1994b. Silvanerpeton miripedes, a new anthracosauroid from the Viséan of East Kirkton, West Lothian, Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 84(for 1993), 369–376.Google Scholar
Clack, J. A. 1997. The Scottish Carboniferous tetrapod Crassigyrinus scoticus (Lydekker)—cranial anatomy and relationships. Transactions of the Royal Society of Edinburgh: Earth Sciences 88, 127–142.Google Scholar
Clack, J. A. 2002a. An early tetrapod from Romer's Gap. Nature 418, 72–76.Google Scholar
Clack, J. A. 2002b. A revised reconstruction of the dermal skull roof of Acanthostega gunnari, an early tetrapod from the Late Devonian. Transactions of the Royal Society of Edinburgh: Earth Sciences 93, 163–165.Google Scholar
Clack, J. A., Ahlberg, P. E., Finney, S. M., Dominguez Alonso, P., Robinson, J. & Ketcham, R. A. 2003. A uniquely specialized ear in a very early tetrapod. Nature 425, 66–69.Google Scholar
Clack, J. A., Ahlberg, P. E., Blom, H. & Finney, S. M. 2012. A new genus of Devonian tetrapod from North-East Greenland, with new information on the lower jaw of Ichthyostega. Palaeontology 55, 73–86.Google Scholar
Clack, J. A., Bennett, C. E., Carpenter, D. K., Davies, S. J., Fraser, N. C., Kearsey, T. I., Marshall, J. E. A., Millward, D., Otoo, B. K. A., Reeves, E. J., Ross, A. J., Ruta, M., Smithson, K. Z., Smithson, T. R. & Walsh, S. A. 2016. Phylogenetic and environmental context of a Tournaisian tetrapod fauna. Nature Ecology & Evolution 1, 0002.Google Scholar
Clack, J. A. & Ahlberg, P. E. 2004. A new stem tetrapod from the Early Carboniferous of Northern Ireland. In Arratia, G., Wilson, M. V. H. & Cloutier, R. (eds). Recent Advances in the Origin and Early Radiation of Vertebrates, 309–320. München: Verlag Dr. Friedrich Pfeil. 703 pp.Google Scholar
Clack, J. A. & Carroll, S. L. 2000. Early Carboniferous tetrapods. In Heatwole, H., Carroll, R. L. (eds) Amphibian Biology, 1030–1043. Chipping Norton: Surrey Beatty.Google Scholar
Clack, J. A. & Finney, S. M. 2005. Pederpes finneyae, an articulated tetrapod from the Tournaisian of western Scotland. Journal of Systematic Palaeontology 2, 311–346.Google Scholar
Cleal, C. J. & Thomas, B. A. 1995. Palaeozoic palaeobotany of Great Britain. Geological Conservation Review Series 9. London: Chapman & Hall.Google Scholar
Coates, M. I. 1996. The Devonian tetrapod Acanthostega gunnari Jarvik: postcranial anatomy, basal tetrapod interrelationships and patterns of skeletal evolution. Transactions of the Royal Society of Edinburgh: Earth Sciences 87, 363–421.Google Scholar
Coates, M. I., Ruta, M. & Friedman, M. 2008. Ever since Owen: changing perspectives on the early evolution of tetrapods. Annual Review of Ecology, Evolution and Systematics 39, 571–592.Google Scholar
Daeschler, E. B. 2000. Early tetrapod jaws from the Late Devonian of Pennsylvania, USA. Journal of Paleontology 74, 301–308.Google Scholar
Daeschler, E. B., Shubin, N. H. & Jenkins, F. A. Jr. 2006. A Devonian tetrapod-like fish and the evolution of the tetrapod body plan. Nature 440, 757–763.Google Scholar
Davies, A., McAdam, A. D. & Cameron, I. B. 1986. Geology of the Dunbar district. Memoir of the British Geological Survey. London: HMSO.Google Scholar
Downs, J., Daeschler, E. B., Jenkins, F. A. Jr. & Shubin, N. H. 2008. The cranial endoskeleton of Tiktaalik roseae. Nature 455, 925–929.Google Scholar
Godfrey, S. J. 1989. The postcranial skeletal anatomy of the Carboniferous tetrapod Greererpeton burkemorani Romer, 1969. Philosophical Transactions of the Royal Society, London, Series B 323, 75–133.Google Scholar
Godfrey, S. J., Fiorillo, A. R. & Carroll, R. L. 1987. A newly discovered skull of the temnospondyl amphibian Dendrerpeton acadianum Owen. Canadian Journal of Earth Sciences 24, 796–805.Google Scholar
Goodrich, E. S. 1930. Studies on the structure and development of vertebrates. Volume 1. London: Macmillan. 837 pp.Google Scholar
Holmes, R. 1984. The Carboniferous amphibian Proterogyrinus scheelei Romer, and the early evolution of tetrapods. Philosophical Transactions of the Royal Society, London, Series B 306, 431–524.Google Scholar
Holmes, R. B., Carroll, R. L. & Reisz, R. R. 1998. The first articulated skeleton of Dendrerpeton acadianum (Temnospondyli, Dendrerpetontidae) from the Lower Pennsylvanian locality of Joggins, Nova Scotia, and a review of its relationships. Journal of Vertebrate Paleontology 18, 64–79.Google Scholar
Jarvik, E. 1980. Basic Structure and Evolution of Vertebrates, vol 1. London: Academic Press.Google Scholar
Jarvik, E. 1996. The Devonian tetrapod Ichthyostega. Fossils and Strata 40, 1–213.Google Scholar
Lebedev, O. A. & Clack, J. A. 1993. Upper Devonian tetrapods from Andreyevka, Tula Region, Russia. Palaeontology 36, 721–734.Google Scholar
Lombard, R. E. & Bolt, J. R. 1995. A new primitive tetrapod, Whatcheeria deltae, from the Lower Carboniferous of Iowa. Palaeontology 38, 471–494.Google Scholar
Lombard, R. E. & Bolt, J. R. 2006. The mandible of Whatcheeria deltae, an early tetrapod from the Late Mississippian of Iowa. In Carrano, M. T., Blob, R. A., Gaudin, T. J. & Wible, J. R. (eds) Amniote Paleobiology: Perspectives on the Evolution of Mammals, Birds and Reptiles, 21–52. Chicago: University of Chicago Press. 448 pp.Google Scholar
Milner, A. C. & Lindsay, W. 1998. Postcranial remains of Baphetes and their bearing on the relationships of the Baphetidae (= Loxommatidae). Zoological Journal of the Linnean Society 122, 211–235.Google Scholar
Milner, A. R. & Sequeira, S. E. K. 1994. The temnospondyl amphibians from the Viséan of East Kirkton, West Lothian, Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 84(for 1993), 331–361.Google Scholar
Monaghan, A. A. & Pringle, M. S. 2004. 40Ar/39Ar Geochronology of Carboniferous–Permian Volcanism in the Midland Valley, Scotland. In Wilson, M., Neumann, E.-R., Davies, G. R., Timmerman, M. J., Heeremans, N. & Larsen, B. T. (eds) Permo-Carboniferous Magmatism & Rifting in Europe. Geological Society, London, Special Publications 223, 219–242. London & Bath: The Geological Society. 498 pp.Google Scholar
Neves, R., Gueinn, K. J., Ioannides, N. S., Neville, R. S. W. & Kruszewska, K. 1973. Palynological correlations within the Lower Carboniferous of Scotland and northern England. Transactions of the Royal Society of Edinburgh 69, 23–70.Google Scholar
Neves, R. & Ioannides, N. S. 1974. Palynology of the Lower Carboniferous (Dinantian) of the Spilmersford Borehole, East Lothian, Scotland. Bulletin of the Geological Survey of Great Britain 45, 73–97.Google Scholar
Panchen, A. L. 1975. A new genus and species of anthracosaur amphibian from the Lower Carboniferous of Scotland and the status of Pholidogaster pisciformis Huxley. Philosophical Transactions of the Royal Society, London, Series B 269, 581–637.Google Scholar
Panchen, A. L. 1985. On the amphibian Crassigyrinus scoticus Watson from the Carboniferous of Scotland. Philosophical Transactions of the Royal Society, London, Series B 309, 505–568.Google Scholar
Panchen, A. L. & Smithson, T. R. 1990. The pelvic girdle and hind limb of Crassigyrinus scoticus (Lydekker) from the Scottish Carboniferous and the origin of the tetrapod pelvic skeleton. Transactions of the Royal Society of Edinburgh: Earth Sciences 81, 31–44.Google Scholar
Paton, R. L., Smithson, T. R. & Clack, J. A. 1999. An amniote-like skeleton from the Early Carboniferous of Scotland. Nature 398, 508–513.Google Scholar
Robinson, J., Ahlberg, P. E. & Koentges, G. 2005. The braincase and middle ear region of Dendrerpeton acadianum (Tetrapoda: Temnospondyli). Zoological Journal of the Linnean Society 143, 577–597.Google Scholar
Romer, A. S. 1956. The early evolution of land vertebrates. Proceedings of the American Philosophical Society 100, 157–167.Google Scholar
Ruta, M., Jeffery, J. E. & Coates, M. I. 2013. A supertree of early tetrapods. Proceedings of the Royal Society, London, Series B 270, 2507–2516.Google Scholar
Ruta, M. & Clack, J. A. 2006. A review of Silvanerpeton miripedes, a stem amniote from the Lower Carboniferous of East Kirkton. Transactions of the Royal Society of Edinburgh: Earth Sciences 97, 31–63.Google Scholar
Schultze, H. P. & Arsenault, M. 1985. The panderichthyid fish Elpistostege: a close relative of tetrapods? Palaeontology 28, 293–309.Google Scholar
Shubin, N. H., Daeschler, E. B. & Jenkins, F. A. Jr. 2006. The pectoral fin of Tiktaalik roseae and the origin of the tetrapod limb. Nature 440, 764–771.Google Scholar
Shubin, N. H., Daeschler, E. B. & Jenkins, F. A. Jr. 2014. Pelvic girdle and fin of Tiktaalik roseae. Proceedings of the National Academy of Sciences 111, 893–899.Google Scholar
Smithson, T. R. 1982. The cranial morphology of Greererpeton burkemorani Romer (Amphibia: Temnospondyli). Zoological Journal of the Linnean Society 76, 29–90.Google Scholar
Smithson, T. R., Wood, S. P., Marshall, J. E. A. & Clack, J. A. 2012. Earliest Carboniferous tetrapod and arthropod faunas from Scotland populate Romer's Gap. Proceedings of the National Academy of Sciences 109, 4532–4537.Google Scholar
Swofford, D. L. 2003. PAUP* Phylogenetic Analysis Using Parsimony (*and Other Methods). Version 4. Sunderland, Massachusetts: Sinauer Associates.Google Scholar
Vorobyeva, E. & Schultze, H.-P. 1991. Description of panderichthyid fishes with comments on their relationship to tetrapods. In Schultze, H.-P. & Trueb, L. (eds) Origins of the Higher Groups of Tetrapods: Controversy and Consensus, 68–109. Ithaca: Cornell University Press.Google Scholar
Ward, P., Labandeira, C., Laurin, M. & Berner, R. A. 2006. Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization. Proceedings of the National Academy of Sciences 103, 16818–22.Google Scholar
Warren, A. 2007. New data on Ossinodus pueri, a stem tetrapod from the Early Carboniferous of Australia. Journal of Vertebrate Paleontology 27, 850–862.Google Scholar
Warren, A. & Turner, S. 2004. The first stem tetrapod from Lower Carboniferous of Gondwana. Palaeontology 47, 151–184.Google Scholar
Waters, C. N., Somerville, I. D., Jones, N. S., Cleal, C. J., Collinson, J. D., Waters, R. A., Besly, B. M., Dean, M. T., Stephenson, M. H., Davies, J. R., Freshney, E. C., Jackson, D. I., Mitchell, W. I., Powell, J. H., Barclay, W. J., Browne, M. A. E., Leveridge, B. E., Long, S. L. & McLean, D. 2011. A revised correlation of Carboniferous rocks in the British Isles. Geological Society of London, Special Report 26. London & Bath: The Geological Society. 186 pp.Google Scholar
Witzmann, F., Scholz, H., Müller, J. & Kardjilov, N. 2010. Sculpture and vascularization of dermal bones, and the implications for the physiology of basal tetrapods. Zoological Journal of the Linnean Society 160, 302–340.Google Scholar
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