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A new arthropod Jugatacaris agilis n. gen. n. sp. from the Early Cambrian Chengjiang biota, South China

Published online by Cambridge University Press:  14 July 2015

Dongjing Fu  and
Xingliang Zhang
Dongjing Fu
Affiliation:
State Key Laboratory of Continental Dynamics, Department of Geology and Early Life Institute, Northwest University, Xian 710069, P.R. China,
Xingliang Zhang
Affiliation:
State Key Laboratory of Continental Dynamics, Department of Geology and Early Life Institute, Northwest University, Xian 710069, P.R. China,
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Abstract

A new arthropod Jugatacaris agilis n. gen. n. sp. with excellent soft anatomy is reported from the Early Cambrian Chengjiang biota. Its “bivalved” carapace with a dorsal fin-like fusion is distinct from those of other Cambrian arthropods. A pair of stalked eyes and a prominent median eye protrudes the carapace anteriorly. The cephalon, attaching to the carapace through the lateral adductor muscles at maxillary segment, bears an antennule, antenna and mandible. The trunk is comprised of a large number of segments (varying from 55 to 65), two-thirds of which is covered by the carapace. Each segment, except for the posterior three to five, carries a pair of uniform biramous appendages. The endopodite is composed of 30 podomeres and a terminal claw. The oar-shaped exopododite is fringed with filaments and distally bears a broad setiferous lobe. Trunk terminates with a conical telson and a pair of broad furcal rami serving as steering devices. Internal features like gonad and gut have also been found. The presence of the food groove combined with other morphological features indicates that Jugatacaris was a filter feeder. The appendages design associated with the overall body-plan supports the view that Jugatacaris is a crustaceanomorph. The accurate phylogenic assessment will remain the subject of debate until more information becomes available.

Type
Research Article
Information
Journal of Paleontology , Volume 85 , Issue 3 , May 2011 , pp. 567 - 586
Copyright
Copyright © The Paleontological Society 

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References

Briggs, D. E. G. 1976. The arthropod Branchiocaris n. gen., Middle Cambrian, Burgesss Shale, British Columbia. Geological Survey of Canada Bulletin, 264:1–29.Google Scholar
Briggs, D. E. G. 1977. Bivalved arthropods from the Cambrian Burgess Shale of British Columbia. Palaeontology, 20:595–621.Google Scholar
Briggs, D. E. G. 1978. The morphology, mode of life, and affinities of Canadaspis perfecta (Crustacea: Phyllocarida), Middle Cambrian, Burgess Shale, British Columbia. Philosophical Transactions of the Royal Society of London B, 281:439–487.Google Scholar
Briggs, D. E. G. 1981. The arthropod Odaraia alata Walcott, Middle Cambrian, British Columbia. Philosophical Transactions of the Royal Society, London B, 291:541–584.Google Scholar
Briggs, D. E. G., Erwin, D. H., and Collier, F. J. 1994. The fossil and the Burgess Shale. Smithsonian Institution Press, Washington and London, 238 p.Google Scholar
Brusca, R. C. and Brusca, G. J. 2003. Invertebrates. Sinauer Associates, Sunderland, Massachusetts, 936 p.Google Scholar
Budd, G. E. 1999. A nektaspid arthropod from the Early Cambrian Sirius Passet fauna, with a description of retrodeformation based on functional morphology. Palaeontlology, 42:99–122.Google Scholar
Budd, G. E. 2002. A palaeontological solution to the arthropod head problem. Nature, 417:271–275.Google Scholar
Budd, E. G. 2008. Head structure in upper stem-group euarthropods. Palaeontology, 51:561–573.Google Scholar
Budd, E. G. and Jensen, S. R. 2000. A critical reappraisal of the fossil record of the bilaterian animal phyla. Biological Reviews, 75:253–295.Google Scholar
Chen, J.-Y. 2004. The dawn of animal world. Jiangsu Science and Technology Press, Chian, 366 p. (In Chinese).Google Scholar
Chernysheva, N. E. 1960. Osnovy paleontologii: chlenistonogie, trilobitoobraznye I rakoobraznye [Principles of palaeontology: arthropods, Trilobitomorpha and Crustaceomorpha], 201-206. Gosudarstvennoe Nauchno Tekhnicheskoe Izdadelstvo Literatury po Geologii i Okhrane Nedr, Moskva, 516 p.Google Scholar
Conway Morris, S., Pell, J. S., Higgins, A. K., Soper, N. J., and Davis, N. C. 1987. A Burgess Shale-like fauna from the Lower Cambrian of North Greenland. Nature, 345:802–805.Google Scholar
Edgecombe, G. D. 2010. Arthropod phylogeny: an overview from the perspective of morphology, molecular data and the fossil record. Arthropod Structure & Development, 39:74–87.CrossRefGoogle ScholarPubMed
Harrington, H. J. 1959. General description of Trilobita, p. 38–117. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Pt. O. Arthropoda 1. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Harvey, T. H. P. and Butterfield, N. J. 2008. Sophisticated particle-feeding in a large Early Cambrian crustacean. Nature, 452:868–871.Google Scholar
Hou, X.-G. 1987a. Early Cambrian large bivalved arthropods from Chengjiang, easten Yunnan. Acta Palaeontologica Sinica, 26:286–298. (In Chinese).Google Scholar
Hou, X.-G. 1987b. Three new large arthropods from Lower Cambrian, Chengjiang, eastern Yunnan. Acta Palaeontologica Sinica, 26:272–285. (In Chinese).Google Scholar
Hou, X.-G. 1999. New rare bivalved arthropods from Lower Cambrian Chengjiang fauna, Yunnan, China. Journal of Paleontology, 73:102–116.Google Scholar
Hou, X.-G., Aldridge, R. J., Bergström, J., Siveter, D. J., and Feng, X.-H. 2004a. The Cambrian fossils of Chengjiang, China: the flowering of early animal life. Blackwell Publishing, Oxford, U.K., 233 p.Google Scholar
Hou, X.-G. and Bergström, J. 1991. The arthropods of the Lower Cambrian Chengjiang fauna, with relationships and evolutionary significance, p. 179–187. In Simonetta, A. M. and Conway Morris, S. (eds.), The Early Evolution of Metazoan and the Significance of Problematic Taxa. Cambridge University Press, Cambridge.Google Scholar
Hou, X.-G. and Bergström, J. 1997. Arthropod of the Lower Cambrian Chengjiang fauna, southwest China. Fossils and Strata, 45:1–116.Google Scholar
Hou, X.-G., Bergström, J., Wang, H.-F., Feng, X.-H., and Chen, A.-L. 1999. The Chengjiang Fauna. Exceptionally Well-Preserved Animals from 530 Million Years Ago. Yunnan Science and Technology Press, Kunming, 170 p. (In Chinese).Google Scholar
Hou, X.-G., Bergström, J., and Xu, G.-X. 2004b. The Lower Cambrian Crusracean Pectocaris from the Chengjiang biota, Yunnan, China. Journal of Paleontology, 78:700–708.Google Scholar
Hou, X.-G., Ramsköld, L., and Bergström, J. 1991. Composition and preservation of the Chengjiang fauna-a Lower Cambrian soft-bodied biota. Zoologica Scripta, 20:395–411.Google Scholar
Hou, X.-G. and Sun, W.-G. 1988. Discovery of Chengjiang fauna at Meishucun, Jinning, Yunnan. Acta Palaeontologica Sinica, 27:1–12. (In Chinese).Google Scholar
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 and Technology Press, Kunming, China. 129 p. (In Chinese).Google Scholar
Moore, R. C. and McCormick, Lavon. 1969. General features of Crustacea, p. 57–120. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Pt. R. Arthropoda 4. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Müller, K. J. 1983. Crustacea with preserved soft parts from the Upper Cambrian of Sweden. Lethaia, 16:93–109.Google Scholar
Nedin, C. 1995. The Emu Bay Shale, a Lower Cambrian fossil Lagerstätten, Kangaroo Island, South Austrilia. Memoirs of the Association of Australian Palaeontologists, 18:31–40.Google Scholar
Nedin, C. 1999. Anomalocaris predation on nonmineralized and mineralized trilobites. Geology, 27:987–990.Google Scholar
Resser, C. E. 1929. New Lower and Middle Cambrian Crustacean. Proceeding U. S. National Museum, 76:1–18.Google Scholar
Paterson, J. R., Gehling, J. G., García-Bellido, D. C., Edgecombe, G. D., and Lee, M. S. Y. 2008. Early Cambrian arthropods from the Emu Bay Shale Lagerstätte, South Austrilia, p. 319–325. In Rábano, I., Gozalo, R. and García-Bellido, D. (eds.), Advances in trilobite research. Instituto Geológico y Minero de España, Madrid.Google Scholar
Simonetta, A. M. and Delle Cave, L. 1975. The Cambrian non trilobite arthropods from the Burgess Shale of British Columbia. A study of their comparative morphology, taxonomy and evolutionary signigicance. Palaeontography Italy, 69, 37 p.Google Scholar
Stein, M., Peel, J.S., Siveter, D.J., and Williams, M. 2010. Isoxys (Arthropoda) with preserved soft anatomy from the Sirius Passet Lagerstätte, Lower Cambrian of North Greeland. Lethaia, 43:258–265.Google Scholar
Taylor, R. S. 2002. A new bivalved arthropod from the early Cambrain Sirius Passet fauna, North Greenland. Palaeontology, 45:97–123.Google Scholar
Vannier, J. and Abe, K. 1992. Recent and Early Palaeozoic Myodocope Ostracodes: functional morphology, phylogeny, distribution and lifestyles. Palaeontology, 35:485–517.Google Scholar
Vannier, J. and Abe, K. 1995. Size, body plan and respiration in the Ostracoda. Palaeontology, 38:843–873.Google Scholar
Vannier, J., Boissy, P., and Racheboeuf, P. R. 1997. Locomotion in Nebalia bipes: a possible model for Palaeozoic phyllocarid crustaceans. Lethaia, 30:89–104.Google Scholar
von Siebold, C. T. E. and Stannius, H. 1845. Lehruch der verliechenden Anatomie der wirbellosen Tiere. Viet, Berlin.Google Scholar
Walcott, C. D. 1912. Cambrian geology and paleontology. No. 6. Middle Cambrian Branchiopoda, Malacostraca, Trilobita, and Merostomata. Smithsonian Miscellaneous Collections, 57:145–229.Google Scholar
Walossek, D. 1993. The Upper Cambrian Rehbachiella and the phylogeny of Branciopoda and Crustacea. Fossils and Strata, 32:1–202.Google Scholar
Waloszek, D., Chen, J.-Y., Maas, A., and Wang, X.-Q. 2005. Early Cambrian arthropods-new insights into arthropod head and structure evolution. Arthopod Structure and Development, 34:189–205.Google Scholar
Walossek, D. and Müller, K. J. 1998a. Cambrian ‘Orsten’-type arthropods and the phylogeny of Crustacea, p. 139–154. In Fortey, R. A. and Thomas, R. H. (eds.), Arthropod Relationships. Chapman and Hall, London.Google Scholar
Walossek, D. and Müller, K. J. 1998b. Early arthropod phylogeny in light of the Cambrian ‘Orsten’ fossils, p. 185–231. In Edgecombe, G. D. (ed.), Arthropod Fossils and Phylogeny. Columbia University Press, New York.Google Scholar
Whittington, W. 1985. The Burgess Shale. Yale Unversity Press, New Haven, 256 p.Google Scholar
Wills, M. A. 1998. A phylogeny of recent and fossil Crustacea derived from morphological characters, p. 189–210. In Fortey, R. A. and Thomas, R. H. (eds.), Arthropod Relationships. Chapman and Hall, London.Google Scholar
Zhang, X.-G., Siveter, D. J., Waloszek, D., and Maas, A. 2007. An epipodite-bearing crown-group crustacean from the Lower Cambrian. Nature, 449:595–598.CrossRefGoogle ScholarPubMed
Zhang, X.-L. and Briggs, D. E. G. 2007. The nature and significance of the appendages of Opabinia from the Middle Cambrian Burgess Shale. Lethaia, 40:161–173.Google Scholar
Zhang, X.-L., Liu, W., and Zhao, Y.-L. 2008. Cambrian Burgess Shale-type Lagerstätten in South China: distribution and significance. Gondwana Research, 14:255–262.Google Scholar
Zhang, X.-L. and Shu, D.-G. 2007. Soft anatomy of sunellid arthropods from the Chengjiang Lagerstätte, Lower Cambrian of Southwest China. Journal of Paleontology, 81:1412–1422.Google Scholar
Zhang, X.-L., Shu, D.-G., and Erwin, D. H. 2007. Cambrian naraoiids (Arthropoda): morphology, ontogeny, systematics, and evolutionary relationships. The Paleontological Society Memoir, 68, 52 p.Google Scholar
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 of London, 158:211–218.Google Scholar
Zhao, Y.-L., Yuan, J.-L., Zhu, M.-Y., Yang, R.-D., Guo, Q.-J., Qian, Y., Huang, Y.-Z., and Pan, Y. 1999. A progress report on research on the early Middle Cambrian Kaili biota, Guizhou, P. R. C. Acta Palaeontologica Sinca, 38(Supplement):1–15.Google Scholar