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The resting trace of an acorn-worm (Class: Enteropneusta) from the Lower Triassic

  • Richard J. Twitchett (a1)

Abstract

A new trace fossil from the Lower Triassic of northern Italy is described. It is a sinuous resting trace of a bilaterally symmetrical worm-like animal. The anterior end is characterised by a pair of lateral projections. It most closely resembles an acorn-worm (class Enteropneusta) in morphology. As such, it is the only known resting trace of an acorn-worm from the fossil record.

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Arduini, P., Pinna, G., and Teruzzi, G. 1981. Megaderaion sinemuriense, a new fossil enteropneust of the Sinemurian. Atti della Società Italiana de Scienze Naturale e del Museo Civico di Storia Naturale di Milano, 122:104108.
Barnes, R. S. K., Calow, P., and Olive, P. J. W. 1988. The Invertebrates: a new synthesis. Blackwell Scientific Publications, Oxford, 582 p.
Barrington, E. J. W. 1965. The biology of Hemichordata and Protochordata. Oliver and Boyd, Edinburgh and London, 176 p.
Benton, M. J. 1993. Basal Deuterostomes (Chaetognaths, Hemichordates, Calcichordates, Cephalochordates and Tunicates), p. 529536. In Benton, M. J. (ed.), The Fossil Record 2. Chapman and Hall, London.
Bourne, D. W., and Heezen, B. C. 1965. A wandering enteropneust from the Abyssal Pacific and the distribution of “spiral” tracks on the sea floor. Science, 150:6063.
Broglio Loriga, C., Neri, C., and Posenato, R. 1986. The Lower Triassic of the Dolomites and Cadore, p. 2934. In Permian and Permian-Triassic Boundary in the South-Alpine Segment of Western Tethys. Excursion Guidebook, IGCP Project 203, Brescia.
Bromley, R. G. 1990. Trace Fossils: biology and taphonomy. Special Papers in Palaeontology 3, Unwin Hyman Publishers, London. 280 p.
Bulman, O. M. B. 1970. Graptolithina, with sections on Enteropneusta and Pterobranchia, p. V13. In Teichert, C. and Moore, R. C. (eds.), Treatise on Invertebrate Palaeontology, Part V, 2nd edition. The Geological Society of America and the University of Kansas Press, Lawrence.
Gaillard, C. 1991. Recent organism traces and ichnofacies on the deep-sea floor off New Caledonia, Southwestern Pacific. Palaios, 6:302315.
Kazmierczak, J., and Pszczolkowski, A. 1969. Burrows of Enteropneusta in the Muschelkalk (Mid. Trias) of the Holy Cross Mountains, Poland. Acta Palaeontologica Polonica, 14:299324.
Wetzel, W. 1972. Flintgefüllte Enteropneusten? Wohnröhen in einen Oberkreide-Geschiebe. Schriften des Naturwissenschaftliche Vereins von Schleswig-Holstein, 42:104107.

The resting trace of an acorn-worm (Class: Enteropneusta) from the Lower Triassic

  • Richard J. Twitchett (a1)

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