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A rare onychophoran-like lobopodian from the Lower Cambrian Chengjiang Lagerstätte, southwestern China, and its phylogenetic implications

  • Qiang Ou (a1), Jianni Liu (a2), Degan Shu (a1) (a2), Jian Han (a2), Zhifei Zhang (a2), Xiaoqiao Wan (a1) and Qianping Lei (a1)...

Lobopodians, which diversified and flourished in the Cambrian seas, have long drawn much attention in that not only their extant close relatives, onychophorans and tardigrades, but euarthropods (Chelicerata, Myriapoda, Crustacea, and Hexapoda) may have been deeply rooted in stem-group lobopodians. Antennacanthopodia gracilis new genus and species is described and interpreted here as an “unarmoured” lobopodian from the Chengjiang fossil Lagerstätte (Early Cambrian, —520 Ma), Yunnan, southwestern China. This animal shares with other known Cambrian lobopodians such plesiomorphies (primitive characters) as onychophoran-like overall appearance; a metamerically segmented body covered by slightly sclerotized cuticle, and paired, unjointed lobopodal legs. Antennacanthopodia is also featured by a pair of frontal antennae, potential ocellus-like lateral visual organs, second antennae, a straight, voluminous midgut, diminutive spines arrayed on the leg and the trunk, well-developed leg musculature, highly sclerotized terminal leg pads, and presumptively a pair of posteriormost appendicules. This new taxon, with innovative characters (autapomorphies), furthers our understanding of early lobopodian diversification. Antennacanthopodia is considered closely allied to extant Onychophora based on considerable anatomical similarities. Taken together its “two-segmented” cephalization and appendage-bearing “ocular segment”, this new form may shed some new light on the arthropod groundplan.

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Aguinaldo, A. M. A., Turbeville, J. M., Linford, L. S., Rivera, M. C., Garey, J. R., Raff, R. A., and Lake, J. A. 1997. Evidence for a clade of nematodes, arthropods and other moulting animals. Nature, 387:489493.
Babcock, L. E., Zhang, W. T., and Leslie, S. A. 2001. The Chengjiang biota: record of the Early Cambrian diversification of life and clues to exceptional preservation of fossils. GSA Today, 11:49.
Ballard, J. W. O., Olsen, G. J., Faith, D. P., Odgers, W. A., Rowell, D. M., and Atkinson, P. W. 1992. Evidence from 12S Ribosomal RNA sequences that Onychophorans are modified arthropods. Science, 258:13451348.
Bergström, J. and Hou, X. G. 2001. Cambrian Onychophora or xenusians. Zoologischer Anzeiger, 240:237245.
Brusca, R. C. and Brusca, G. J. 2003. Invertebrates (Second edition). Sinauer Associates, Sunderland, Massachusetts, 880 p.
Budd, G. E. 1993. A Cambrian gilled lobopod from Greenland. Nature, 364:709711.
Budd, G. E. 1997. Stem group arthropods from the Lower Cambrian Sirius Passet fauna of North Greenland, p. 125138. In Fortey, R. A. and Thomas, R. H. (eds.), Arthropod Relationships. Chapman & Hall, London.
Budd, G. E. and Peel, J. S. 1998. A new xenusiid lobopod from the Early Cambrian Sirius Passet fauna of North Greenland. Palaeontology, 41:12011213.
Budd, G. E. 1999. The morphology and phylogenetic significance of Kerygmachela kierkegaardi Budd (Buen Formation, Lower Cambrian, N. Greenland). Transactions of the Royal Society of Edinburgh: Earth Sciences, 89:249290.
Budd, G. E. 2002. A palaeontological solution to the arthropod head problem. Nature, 417:271275.
Budd, G. E. and Telford, M. J. 2009. The origin and evolution of arthropods. Nature, 457:812817.
Chen, J. Y., Hou, X. G., and Lu, H. Z. 1989. Early Cambrian netted scale-bearing worm-like sea animal. Acta Palaeontologica Sinica, 28:216. (In Chinese).
Chen, J. Y., Zhou, G. Q., and Ramsköld, L. 1995a. The Cambrian Lobopodian Microdictyon sinicum. Bulletin of National Museum of Natural Science, Number 5, 25 p.
Chen, J. Y., Zhou, G. Q., and Ramsköld, L. 1995b. A new Early Cambrian onychophoran-like animal, Paucipodia gen. nov., from the Chengjiang fauna, China. Transactions of the Royal Society of Edinburgh: Earth Sciences, 85:275282.
Chen, J. Y., Edgecombe, G. D., Ramsköld, L., and Zhou, G. Q. 1995c. Head segmentation in Early Cambrian Fuxianhuia: implications for arthropod evolution. Science, 268:13391343.
Collins, D. 1986. Paradise revisited. Rotunda, 19:3039.
Conway Morris, S. 1977. A new metazoan from the Cambrian Burgess Shale of British Columbia. Palaeontology, 20:623640.
Conway Morris, S. and Robison, R. A. 1988. More soft-bodied animals and algae from the Middle Cambrian of Utah and British Columbia. The University of Kansas Paleontological Contributions, 122:148.
Delle Cave, L. and Simonetta, A. M. 1975. Notes on the morphology and taxonomic position of Aysheaia (Onychophora?) and of Skania (undetermined phylum). Monitore Zoologica Italica, 9:6781.
Dunn, C. W., Hejnol, A., Matus, D. Q., Pang, K., Browne, W. E., Smith, S. A., Seaver, E., Rouse, G. W., Obst, M., Edgecombe, G. D., et al. 2008. Broad phylogenomic sampling improves resolution of the animal tree of life. Nature, 452:745749.
Dzik, J. and Krumbiegel, G. 1989. The oldest “onychophoran” Xenusion: a link connecting phyla? Lethaia, 22:169181.
Edgecombe, G. D. 2009. Palaeontological and molecular evidence linking arthropods, onychophorans, and other Ecdysozoa. Evolution: Education and Outreach, 2:178190.
Edgecombe, G. D. 2010. Arthropod phylogeny: an overview from the perspectives of morphology, molecular data and the fossil record. Arthropod Structure & Development, 39:7487.
Engel, M. S. and Grimaldi, D. A. 2002. The first Mesozoic Zoraptera (Insecta). American Museum Novitates, 3362:120.
Eriksson, B. J. and Budd, G. E. 2001. Onychophoran cephalic nerves and their bearing on our understanding of head segmentation and stem-group evolution of Arthropoda. Arthropod Structure & Development, 29:197209.
Eriksson, B. J., Tait, N. N., and Budd, G. E. 2003. Head development in the onychophoran Euperipatoides kanangrensis with particular reference to the central nervous system. Journal of Morphology, 255:123.
Gabbott, S. E., Hou, X. G., Norry, M. J., and Siveter, D. J. 2004. Preservation of Early Cambrian animals of the Chengjiang biota. Geology, 32:901904.
Grimaldi, D. A., Engel, M. S., and Nascimbene, P. C. 2002. Fossiliferous Cretaceous amber from Myanmar (Burma): its rediscovery, biotic diversity, and paleontological significance. American Museum Novitates, 3361:171.
Hou, X. G. and Chen, J. Y. 1989. Early Cambrian arthropod-annelid intermediate sea animal, Luolishania gen. nov. from Chengjiang, Yunnan. Acta Palaeontologica Sinica, 28:207213. (In Chinese).
Hou, X. G., Ramsköld, L., and Bergström, J. 1991. Composition and preservation of the Chengjiang fauna—a Lower Cambrian soft-bodied biota. Zoologics Scripts, 20:395411.
Hou, X. G. and Bergström, J. 1995. Cambrian lobopodians—ancestors of extant onychophorans? Zoological Journal of the Linnaean Society, 114:319.
Hou, X. G., Ma, X. Y., Zhao, J., and Bergström, J. 2004. The lobopodian Paucipodia inermis from the Lower Cambrian Chengjiang fauna, Yunnan, China. Lethaia, 37:235244.
Hutchinson, G. E. 1930. Restudy of some Burgess Shale fossils. Proceedings of the United States National Museum, 78:111.
Liu, J. N., Shu, D. G., Han, J., and Zhang, Z. F. 2004. A rare lobopod with well-preserved eyes from Chengjiang Lagerstätte and its implications for origin of arthropods. Chinese Science Bulletin, 49:10631071.
Liu, J. N., Shu, D. G., Han, J., Zhang, Z. F., and Zhang, X. L. 2006. A large xenusiid lobopod with complex appendages from the Chengjiang Lagerstätte (Lower Cambrian, China). Acta Palaeontologica Polonica, 51:215222.
Liu, J. N., Shu, D. G., Han, J., Zhang, Z. F., and Zhang, X. L. 2007. Morpho-anatomy of the lobopod Magadictyon cf. haikouensis from the Early Cambrian Chengjiang Lagerstätte, South China. Acta Zoologica, 88:279288.
Liu, J. N., Shu, D. G., Han, J., Zhang, Z. F., and Zhang, X. L. 2008. The lobopod Onychodictyon from the Lower Cambrian Chengjiang Lagerstätte revisited. Acta Palaeontologica Polonica, 53:285292.
Liu, J. N., Steiner, M., Dunlop, J. A., Keupp, H., Shu, D. G., Ou, Q., Han, J., Zhang, Z. F., and Zhang, X. L. 2011. An armoured Cambrian lobopodian from China with arthropod-like appendages. Nature, 470:526530.
Luo, H. L., Hu, S. X., Chen, L. Z., Zhang, S. S., and Tao, Y. H. 1999. Early Cambrian Chengjiang Fauna from Kunming Region, China. Yunnan Science Technology Press, Kunming, 129 p. (In Chinese).
Ma, X. Y., Hou, X. G., and Bergström, J. 2009. Morphology of Luolishania longicruris (Lower Cambrian, Chengjiang Lagerstätte, SW China) and the phylogenetic relationships within lobopodians. Arthropod Structure & Development, 38:271291.
Maas, A., Mayer, G., Kristensen, R. M., and Waloszek, D. 2007. A Cambrian micro-lobopodian and the evolution of arthropod locomotion and reproduction. Chinese Science Bulletin, 52:33853392.
Mayer, G. and Koch, M. 2005. Ultrastructure and fate of the nephridial anlagen in the antennal segment of Epiperipatus biolleyi (Onychophora, Peripatidae)—evidence for the onychophoran antennae being modified legs. Arthropod Structure & Development, 34:471480.
Mayer, G. 2006. Structure and development of onychophoran eyes: what is the ancestral visual organ in arthropods? Arthropod Structure & Development, 35:231245.
Mayer, G. and Whitington, P. M. 2009. Velvet worm development links myriapods with chelicerates. Proceedings of the Royal Society B: Biological Sciences, 276:35713579.
Mayer, G., Whitington, P. M., Sunnucks, P., and Pflüger, H. J. 2010. A revision of brain composition in Onychophora (velvet worms) suggests that the tritocerebrum evolved in arthropods. BMC Evolutionary Biology, 10:255.
Müller, W. A. 1996. Developmental Biology. Springer-Verlag, New York, 382 p.
Ou, Q., Shu, D. G., Han, J., Zhang, X. L., Zhang, Z. F., and Liu, J. N. 2009. A juvenile redlichiid trilobite caught on the move: evidence from the Cambrian (Series 2) Chengjiang Lagerstätte, southwestern China. Palaios, 24:473477.
Poinar, G. O. Jr. 1996. Fossil velvet worms in Baltic and Dominican amber: onychophoran evolution and biogeography. Science, 273:13701371.
Poinar, G. O. Jr. 2000. Fossil onychophorans from Dominican and Baltic amber: Tertiapatus dominicanus n. gen. n. sp. (Tertiapatidae n. fam.) and Succinipatopsis balticus n. gen., n. sp. (Succinipatopsidae n. fam.) with a proposed classification of the subphylum Onychophora. Invertebrate Biology, 119:104109.
Pompeckj, J. F. 1927. Ein neues Zeugnis uralten Lebens. Paläontologische Zeitschrift, 9:287313. (In German).
Ramsköld, L. and Chen, J. Y. 1998. Cambrian lobopodians: morphology and phylogeny, p. 107150. In Edgecombe, G. D. (ed.), Arthropod Fossils and Phylogeny. Columbia University Press, New York.
Ramsköld, L. and Hou, X. G. 1991. New Early Cambrian animal and onychophoran affinities of enigmatic metazoans. Nature, 351:225228.
Ramsköld, L. 1992. Homologies in Cambrian Onychophora. Lethaia, 25:443460.
Robison, R. A. 1985. Affinities of Aysheaia (Onychophora), with description of a new Cambrian species. Journal of Paleontology, 59:226235.
Schoenemann, B., Liu, J. N., Shu, D. G., Han, J., and Zhang, Z. F. 2009. A miniscule optimized visual system in the Lower Cambrian. Lethaia, 42:265273.
Scholtz, G. and Edgecombe, G. D. 2006. The evolution of arthropod heads: reconciling morphological, developmental and palaeontological evidence. Development, Genes and Evolution, 216:395415.
Shu, D. G., Conway Morris, S., Han, J., Chen, L., Zhang, X. L., Zhang, Z. F., Liu, H. Q., Li, Y., and Liu, J. N. 2001. Primitive deuterostomes from the Chengjiang Lagerstätte (Lower Cambrian, China). Nature, 414:419424.
Shu, D. G., Luo, H. L., Conway Morris, S., Zhang, X. L., Hu, S. X., Chen, L., Han, J., Zhu, M., Li, Y., and Chen, L. Z. 1999. Lower Cambrian vertebrates from South China. Nature, 402:4246.
Snodgrass, R. E. 1938. Evolution of the Annelida, Onychophora, and Arthopoda. Smithsonian Miscellaneous Collections, 97:1159.
Strausfeld, N. J., Strausfeld, C. M., Loesel, R., Rowell, D., and Stowe, S. 2006. Arthropod phylogeny: onychophoran brain organization suggests an archaic relationship with a chelicerate stem lineage. Proceedings of the Royal Society B: Biological Sciences, 273(1596):18571866.
Thompson, I. and Jones, D. S. 1980. A possible onychophoran from the Middle Pennsylvanian Mazon Creek beds of northern Illinois. Journal of Paleontology, 54:588596.
von Bitter, P. H., Purnell, M. A., Tetreault, D. K., and Stott, C. A. 2007. Eramosa Lagerstätte—exceptionally preserved soft-bodied biotas with shallow-marine shelly and bioturbating organisms (Silurian, Ontario, Canada). Geology, 35:879882.
Walcott, C. D. 1911. Middle Cambrian annelids. Cambrian geology and paleontology II: Smithsonian Miscellaneous Collections, 57:109144.
Waloszek, D., Chen, J. Y., Maas, A., and Wang, X. Q. 2005. Early Cambrian arthropods—new insights into arthropod head and structural evolution. Arthropod Structure & Development, 34:189205.
Waloszek, D., Maas, A., Chen, J. Y., and Stein, M. 2007. Evolution of cephalic feeding structures and the phylogeny of Arthropoda. Palaeogeography, Palaeoclimatology, Palaeoecology, 254:273287.
Whittington, H. B. 1978. The lobopod animal Aysheaia pedunculata Walcott, Middle Cambrian, Burgess Shale, British Columbia. Philosophical Transactions of the Royal Society B: Biological Sciences, 284:165197.
Whittington, H. B. 1985. The Burgess Shale. Yale University Press, New Haven and London, 151 p.
Whittle, R. J., Gabbott, S. E., Aldridge, R. J., and Theron, J. 2009. An Ordovician lobopodian from the Soom Shale Lagerstätte, South Africa. Palaeontology, 52:561567.
Xiao, S. H. 2004. An arthropod sphinx. Chinese Science Bulletin, 49:983984.
Zhang, X. L., Shu, D. G., Li, Y., and Han, J. 2001. New sites of Chengjiang fossils: crucial windows on the Cambrian explosion. Journal of the Geological Society, 158:211218.
Zhang, X. L., Liu, W., and Zhao, Y. L. 2008. Cambrian Burgess Shale-type Lagerstätten in South China: distribution and significance. Gondwana Research, 14:255262.
Zhang, Z. F., Li, G. X., Emig, C. C., Han, J., Holmer, L. E., and Shu, D. G. 2009. Architecture and function of the lophophore in the problematic brachiopod Heliomedusa orienta (Early Cambrian, South China). Geobios, 42:649661.
Zhou, M. Z., Luo, T. Y., Li, Z. X., Zhao, H., Long, H. S., and Yang, Y. 2008. SHRIMP U-Pb zircon age of tuff at the bottom of the Lower Cambrian Niutitang Formation, Zunyi, South China. Chinese Science Bulletin, 53:576583.
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