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Relating Ediacaran Fronds

  • T. Alexander Dececchi (a1), Guy M. Narbonne (a1), Carolyn Greentree (a2) and Marc Laflamme (a3)

Ediacaran fronds are key components of terminal-Proterozoic ecosystems. They represent one of the most widespread and common body forms ranging across all major Ediacaran fossil localities and time slices postdating the Gaskiers glaciation, but uncertainty over their phylogenetic affinities has led to uncertainty over issues of homology and functional morphology between and within organisms displaying this ecomorphology. Here we present the first large-scale, multigroup cladistic analysis of Ediacaran organisms, sampling 20 ingroup taxa with previously asserted affinities to the Arboreomorpha, Erniettomorpha, and Rangeomorpha. Using a newly derived morphological character matrix that incorporates multiple axes of potential phylogenetically informative data, including architectural, developmental, and structural qualities, we seek to illuminate the evolutionary history of these organisms. We find strong support for existing classification schema and devise apomorphy-based definitions for each of the three frondose clades examined here. Through a rigorous cladistic framework it is possible to discern the pattern of evolution within and between these clades, including the identification of homoplasies and functional constraints. This work both validates earlier studies of Ediacaran groups and accentuates instances in which previous assumptions of their natural history are uninformative.

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J. B. Antcliffe , and M. D. Brasier . 2007. Charnia and sea pens are poles apart. Journal of the Geological Society 164:4951.

E. L. Bamforth , G. M. Narbonne , and M. Anderson . 2008. Growth and ecology of a multi-branched Ediacaran rangeomorph from the Mistaken Point assemblage, Newfoundland. Journal of Paleontology 82:763777.

T. H. Boag , S. A. F. Darroch , and M. Laflamme . 2016. Ediacaran distributions in space and time: testing assemblage concepts of earliest macroscopic body fossils. Paleobiology 42:574594.

M. D. Brasier , and J. B. Antcliffe . 2009. Evolutionary relationships within the Avalonian Ediacara biota: new insights from laser analysis. Journal of the Geological Society 166:363384.

M. D. Brasier , J. B. Antcliffe , and A. G. Liu . 2012. The architecture of Ediacaran fronds. Palaeontology 55:11051124.

G. Burzynski , and G. M. Narbonne . 2015. The discs of Avalon: relating discoid fossils to frondose organisms in the Ediacaran of Newfoundland, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology 434:3445.

D. Erwin , M. Laflamme , S. Tweedt , E. Sperling , D. Pisani , and K. Peterson . 2011. The Cambrian conundrum: early divergence and later ecological success in the early history of animals. Science 334:10911097.

M. A. Fedonkin , and B. Waggoner . 1997. The Late Precambrian fossil Kimberella is a mollusc-like bilaterian organism. Nature 388:868871.

J. G. Gehling , and G. M. Narbonne . 2007. Spindle-shaped Ediacara fossils from the Mistaken Point assemblage, Avalon Zone, Newfoundland. Canadian Journal of Earth Sciences 44:367387.

D. A. Gold , B. Runnegar , J. G. Gehling , and D. K. Jacobs . 2015. Ancestral state reconstruction of ontogeny supports a bilaterian affinity for Dickinsonia . Evolution and Development 17:315324.

D. V. Grazhdankin 2014. Patterns of evolution of the Ediacaran soft-bodied biota. Paleontology 45:5778.

D. V. Grazhdankin , and A. Seilacher . 2002. Underground Vendobionta from Nambia. Journal of Paleontology 88:269283.

A. Y. Ivantsov 2016. Reconstruction of Charniodiscus yorgensis (Macrobiota from the Vendian of the White Sea). Paleontological Journal 50:112.

A. Y. Ivantsov , G. M. Narbonne , P. W. Trusler , C. Greentree , and P. Vickers-Rich . 2016. Elucidating Ernietta: new insights from exceptional specimens in the Ediacaran of Namibia. Lethaia 49:540554.

M. Laflamme , and G. Narbonne . 2008. Ediacaran fronds. Palaeogeography Palaeoclimatology Palaeoecology 258:162179.

M. Laflamme , G. Narbonne , and M. Anderson . 2004. Morphometric analysis of the Ediacaran frond Charniodiscus from the Mistaken Point Formation, Newfoundland. Journal of Paleontology 78:827837.

M. Laflamme , L. Flude , and G. Narbonne . 2012. Ecological tiering and the evolution of a stem: the oldest stemmed frond from the Ediacaran of Newfoundland, Canada. Journal of Paleontology 86:193200.

M. Laflamme , S. A. F. Darroch , S. M. Tweedt , K. J. Peterson , and D. H. Erwin . 2013. The end of the Ediacara biota: extinction, biotic replacement, or Cheshire Cat? Gondwana Research 23:558573.

A. G. Liu , J. J. Matthews , and D. McIlroy . 2016. The Beiothukis/Culmofrons problem and its bearing on Ediacaran macroossil taxonomy: evidence from an exceptional new fossil locality. Palaeontology 59:4558.

G. M. Narbonne . 2004. Modular construction of early Ediacaran complex life forms. Science 305:11411144.

G. M. Narbonne 2005. The Ediacara biota: Neoproterozoic origin of animals and their ecosystems. Annual Review of Earth and Planetary Sciences 33:421442.

G. Narbonne , M. Laflamme , C. Greentree , and P. Trusler . 2009. Reconstructing a lost world: Ediacaran rangeomorphs from Spaniard’s Bay, Newfoundland. Journal of Paleontology 83:503523.

G. Narbonne , M. Laflamme , P. Trusler , R. W. Dalrymple , and C. Greentree . 2014. Deep-water Ediacaran fossils from northwestern Canada: taphonomy,ecology, and evolution. Journal of Paleontology 88:207223.

H. Pflug 1972. Systematik der jung-präkambrischen Petalonamae Pflug 1970. Palaontologische Zeitschrift 46:5667.

J. P. Pu , S. A. Bowing , J. Ramezani , P. Myrow , T. D. Raub , E. Landing , A. Mills , E. Hodgin , and F. A. Macdonald . 2016. Dodging snowballs: geochronology of the Gaskiers glaciation and the first appearance of the Ediacaran biota. Geology 44:955958.

P. Vickers-Rich , A. Y. Ivantsov , P. Trusler , G. M. Narbonne , M. Hall , S. A. Wilson , C. Greentree , M. A. Fedonkin , D. A. Elliott , K. H. Hoffmann , and G. I. C. Schneider . 2013. Reconstructing Rangea: new discoveries from the Ediacaran of southern Nambia. Journal of Paleontology 87:115.

J. J. Wiens 2003. Missing data, incomplete taxa, and phylogenetic accuracy. Systematic Biology 52:528538.

J. J. Wiens , and M. C. Morrill . 2011. Missing data in phylogenetic analysis: reconciling results from simulations and empirical data. Systematic Biology 60:719731.

S. Xiao , and M. Laflamme . 2009. On the eve of animal radiation: phylogeny, ecology and evolution of the Ediacara biota. Trends in Ecology and Evolution 24:3140.

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  • ISSN: 0094-8373
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