Three-dimensionally preserved digestive systems of two Cambrian hyolithides (Hyolitha)

 

Authors: Sun H, Babcock LE, Peng J, Zhao Y

Published in: Bulletin of Geosciences, volume 91, issue 1; pages: 51 - 56; Received 30 September 2015; Accepted in revised form 5 November 2015; Online 21 December 2015

Keywords: Hyolitha, Hyolithida, gut tract, Cambrian, Nevada, China,

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Abstract

Hyoliths are a group of Paleozoic marine bilaterian animals with conical aragonitic shells. Evolution of the hyoliths, and their relationships to other early bilaterians, are controversial. New exceptionally preserved hyolithide hyolith specimens from Cambrian Stage 4 strata of Nevada, USA, and Guizhou, China, provide information on the internal soft-part anatomy that is pertinent to understanding the early evolutionary history of the group. Two specimens show partial digestive tracts preserved in three dimensions. The guts comprise a modified U-shaped system consisting of a spiral intestine wound about a nearly straight tube. Similarity to the spiral U-shaped gut tract of sipunculans supports an inferred sister- group relationship between sipunculans and hyoliths.

References

BABCOCK, L.E. 2005. Asymmetry in the fossil record. European Review 13, 135-143.View article

BABCOCK, L.E. & ROBISON, R.A. 1988. Taxonomy and paleobiology of some Middle Cambrian Scenella (Cnidaria) and hyolithids (Mollusca) from western North America. University of Kansas Paleontological Contributions 121, 1-22.

BOTTING, J.P., MUIR, L.A., JORDAN, N. & UPTON, C. 2015. An Ordovician variation on Burgess Shale-type biotas. Scientific Reports 5, 9947.View article

BROOKER, R.J., WIDMAIER, E., GRAHAM, L. & STILING, P. 2014. Principles of Biology. 1072 pp. McGraw-Hill Science/Engineering/Math, New York.

BUTTERFIELD, N.J. 2003. Exceptional fossil preservation and the Cambrian explosion. Integrative and Comparative Biology 43, 166-177.View article

BUTTERFIELD, N.J. & NICHOLAS, C.J. 1996. Burgess shale-type preservation of both non-mineralizing and ‘shelly’ Cambrian organisms from the Mackenzie Mountains, northwestern Canada. Journal of Palaeontology 70, 893-899.View article

CUTLER, E.B. 1994. The Sipuncula - their Systematics, Biology, and Evolution. 480 pp. Cornell University Press, Ithaca, New York.

DEVAERE, L., CLAUSEN, S., ÁLVARO, J.J., PEEL, J.S. & VACHARD, D. 2014. Terreneuvian orthothecid (Hyolitha) digestive tracts from northern Montagne Noire, France: taphonomic, ontogenetic and phylogenetic implications. PLoS ONE 9(2), 1-14.View article

DZIK, J. 1980. Ontogeny of Bactrotheca and related hyoliths. Geologiska Föreningeni Stockholm Förhandlingar 102, 223-233.View article

ENGLISH, A.M. & BABCOCK, L.E. 2010. Census of the Indian Springs Lagerstätte, Poleta Formation (Cambrian), western Nevada, USA. Palaeogeography, Palaeoclimatology, Palaeoecology 295, 236-244.View article

FEDONKIN, M.A. & WAGGONER, B.M. 1997. The late Precambrian fossil Kimberella is a mollusk-like bilaterian organism. Nature 388, 868-871.View article

HORNÝ, R.J. 1998. Lower Ordovician Nephrotheca sarkaensis (Orthothecida, Hyolitha) with fossilized intestinal contents in situ (Šárka Formation, Bohemia). Journal of the National Museum (Prague), Natural History Series 167, 95-98.

HUANG, D.Y., CHEN, J.Y., VANNIER, J. & SAIZ SALINAS, J.I. 2004. Early Cambrian sipunculan worms from Southwest China. Proceedings of the Royal Society (London) B 271, 1671-1676.View article

KOUCHINSKY, A., BENGTSON, S., RUNNEGAR, B., SKOVSTED, C., STEINER, M. & VENDRASCO, M. 2012. Chronology of early Cambrian biomineralization. Geological Magazine 149, 221-251.View article

KRUSE, P.D. 1997. Hyolith guts in the Cambrian of northern Australia - turning hyolithomorphs upside down. Lethaia 29, 213-217.View article

LI, G.X., STEINER, M., ZHU, X.J., YANG, A.H., WANG, H.F. & ERDTMANN, B.D. 2007. Early Cambrian metazoan fossil record of South China: generic diversity and radiation patterns. Palaeogeography, Palaeoclimatology, Palaeoecology 254, 229-249.View article

MALINKY, J.M. 2003. Ordovician and Silurian hyoliths and gastropods reassigned from the Hyolitha from the Girvan district, Scotland. Journal of Paleontology 77, 625-645.View article

MALINKY, J.M. & YOCHELSON, E.L. 2007. On the systematic position of the Hyolitha (kingdom Animalia). Memoirs of the Association of Australasian Palaeontologists 34, 521-536.

MAO, J.R., ZHAO, Y.L., YU, P. & QIAN, Y. 1992. Some middle Cambrian hyolithids from Taijiang, Guizhou. Acta Micropalaeontologica Sinica 9, 257-265. [in Chinese with English abstract]

MAREK, L. 1963. New knowledge on the morphology of Hyolithes. Sborník geologických věd, Paleontologie 1, 53-73.

MAREK, L. 1966. New hyolithid genera from the Ordovician of Bohemia. Časopis Národního muzea, Oddíl přírodovědný 135, 89-92.

MAREK, L. 1967. The class Hyolitha in the Caradoc of Bohemia. Sborník geologických věd 9, 51-112.

MAREK, L. 1972. Maxilites gen. n. ze středního kambria (Hyolitha). Paleozoologie 141, 69-72.

MAREK, L., PARSLEY, R.L. & GALLE, A. 1997. Functional morphology of hyoliths based on flume studies. Věstník Českého geologického ústavu 72, 351-358.

MAREK, L. & YOCHELSON, E.L. 1976. Aspects of the biology of Hyolitha (Mollusca). Lethaia 9, 65-82.View article

MARTÍ MUS, M. & BERGSTRÖM, J. 2005. The morphology of hyolithids and its functional implications. Palaeontology 48, 1139-1167.View article

MARTÍ MUS, M. & BERGSTRÖM, J. 2007. Skeletal microstructure of helens, lateral spines of hyolithids. Palaeontology 50, 1231-1243.View article

MARTÍ MUS, M., JEPPSSON, L. & MALINKY, J.M. 2014. A complete reconstruction of the hyolithid skeleton. Journal of Paleontology 88, 160-170.View article

MESHKOVA, N.P. & SYSOYEV, V.A. 1981. A find of casts of the digestive apparatus of Lower Cambrian hyoliths, 82-85. In SOKOLOV, B.S. (ed.) Phanerozoic Problematica. Institute of Geology and Geophysics, USSR Academy of Science, Novosibirsk.

MISSARZHEVSKIY, B.B. 1989. Drevniyshie skeletne okamenelosti i stratigrafiya poranitsnikh tolsh dokembriya i kembriya. Trudy GIN AN SSSR 443, 1-238. [in Russian]

NARBONNE, G.M., XIAO, S.H. & SHIELDS, G.A. 2012. The Ediacaran Period, 413-435. In GRADSTEIN, F.M., OGG, J.G., SCHMITZ, M.D. & OGG, G.M. (eds) The Geologic Time Scale 2012. Elsevier, Amsterdam.

POJETA, J., Jr. 1987. Phylum Hyolitha, 416-444. In BOARDMAN, R.S., CHEETHAM, A.H. & ROWELL, A.J. (eds) Fossil Invertebrates. Blackwell, Palo Alto, California.

PURCHON, R.D. 1977. The Biology of the Mollusca (second edition). 560 pp. Pergamon Press, Oxford.

QIAN, Y. & XIAO, L.G. 1995. Hyolitha. 262 pp. Science Press, Beijing. [in Chinese]

ROBISON, R.A., BABCOCK, L.E. & GUNTHER, V.G. 2015. Exceptional Cambrian fossils from Utah: a window into the Age of Trilobites. Utah Geological Survey Miscellaneous Publication 15-1, 1-97.

RUNNEGAR, B. 1980. Hyolitha: status of the phylum. Lethaia 13, 21-25.View article

RUNNEGAR, B., POJETA, J., MORRIS, N.J., TAYLOR, J.D., TAYLOR, M.E. & MCCLUNG, G.1975. Biology of Hyolitha. Lethaia 8, 181-191.View article

SHU, D.G., ISOZAKI, Y., ZHANG, X.L., HAN, J. & MARUYAMA, S. 2014. Birth and early evolution of metazoans. Gondwana Research 25, 884-895.View article

SKOVSTED, C.B., PEEL, J. & ATKINS, C.J. 2004. The problematic fossil Triplicatella from the early Cambrian of Greenland, Canada, and Siberia. Canadian Journal of Earth Sciences 41, 1273-1283.View article

SKOVSTED, C.B., TOPPER, T.P., BETTS, M.J. & BROCK, G.A. 2014. Associated conchs and opercula of Triplicatella disdoma (Hyolitha) from the early Cambrian of South Australia. Alcheringa 38, 148-153.View article

THORAL, M. 1935. Contribution a l’étude paléontologique de l’Ordovicien Inférieur de la Montagne Noire et revision sommaire de la faune cambrienne de la Montagne Noire. 362 pp. Imprimerie de la Charité, Montpellier.

VALENT, M. & KRAFT, P. 2009. Fillings of hyolithid guts from the Middle Ordovician of the Prague Basin (Czech Republic), 103-104. NAPC Cincinnati, Cincinnati, Ohio, USA.

WILSON, L. & RATCLIFFE, P. 2003. Three dimensional phosphatic preservation of hyolith guts from the Montagne Noire: insights into hyolith ontogeny and phylogeny. Palaeontological Association Newsletter 54, 186.