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A fourteen-faced hexangulaconulariid from the early Cambrian (Stage 2) Yanjiahe Formation, South China

Published online by Cambridge University Press:  07 August 2019

Junfeng Guo
Affiliation:
School of Earth Science and Land Resources, Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an 710054, P.R. China , <2695489023@qq.com>, <757542074@qq.com>, <512718116@qq.com>
Jian Han*
Affiliation:
Shaanxi Key Laboratory of Early Life and Environment, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, 229 Taibai Road, Xi'an 710069, P.R. China , <799179701@qq.com>,
Heyo Van Iten
Affiliation:
Department of Geology, Hanover College, Hanover, IN 47243, USA and Department of Invertebrate Paleontology, Cincinnati Museum Center, 1301 Western Avenue, Cincinnati, Ohio 45203, USA
Xing Wang
Affiliation:
Shaanxi Key Laboratory of Early Life and Environment, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, 229 Taibai Road, Xi'an 710069, P.R. China , <799179701@qq.com>,
Yaqin Qiang
Affiliation:
School of Earth Science and Land Resources, Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an 710054, P.R. China , <2695489023@qq.com>, <757542074@qq.com>, <512718116@qq.com>
Zuchen Song
Affiliation:
School of Earth Science and Land Resources, Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an 710054, P.R. China , <2695489023@qq.com>, <757542074@qq.com>, <512718116@qq.com>
Wenzhe Wang
Affiliation:
School of Earth Science and Land Resources, Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Chang'an University, Xi'an 710054, P.R. China , <2695489023@qq.com>, <757542074@qq.com>, <512718116@qq.com>
Zhifei Zhang
Affiliation:
Shaanxi Key Laboratory of Early Life and Environment, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, 229 Taibai Road, Xi'an 710069, P.R. China , <799179701@qq.com>,
Guoxiang Li
Affiliation:
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, P.R. China
*Corresponding
*Corresponding author.

Abstract

Extant medusozoans (phylum Cnidaria) are dominated by forms showing tetraradial symmetry, but stem-group medusozoans of early Cambrian age collectively exhibit tetra-, bi-, penta-, and hexaradial symmetry. Moreover, the developmental and evolutionary relationships between four-fold and other types of radial symmetry in medusozoans remain poorly understood. Here we describe a new hexangulaconulariid, Septuconularia yanjiaheensis new genus new species, from Bed 5 of the Yanjiahe Formation (Cambrian Stage 2) in the Three Gorges area of Hupei Province, China. The laterally compressed, biradially symmetrical periderm of this species possesses 14 gently tapered faces, the most of any hexangulaconulariid described thus far. The faces are bordered by longitudinal ridges and crossed by short, irregularly spaced transverse ribs. Longitudinally, the periderm consists of three regions that probably correspond, respectively, to an embryonic stage, a transient juvenile stage, and a long adult stage. Septuconularia yanjiaheensis may have been derived from six-faced Hexaconularia (Fortunian Stage), which is morphologically intermediate between Septuconularia yanjiaheensis and Arthrochites. Furthermore, conulariids sensu stricto, carinachitids, and hexangulaconulariids may constitute a monophyletic group united by possession of an organic or organophosphatic periderm exhibiting longitudinal (corner) sulci, a facial midline, and offset of transverse ribs along the facial midline.

UUID: http://zoobank.org/01a972aa-aef3-4eef-a9a5-c2d8c3dda615

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Articles
Copyright
Copyright © 2019, The Paleontological Society 

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References

Ahn, S.Y., and Zhu, M., 2017, Lowermost Cambrian acritarchs from the Yanjiahe Formation, South China: Implication for defining the base of the Cambrian in the Yangtze Platform: Geological Magazine, v. 154, p. 12171231.CrossRefGoogle Scholar
Bouček, B., 1928, Revision des conulaires Paléozoïques de la Bohême: Palaeontographica Bohemiae, v. 11, p. 60108.Google Scholar
Briggs, D.E.G., Erwin, D.H., and Collier, F.J., 1994, The Fossils of the Burgess Shale: Washington, D.C., and London, Smithsonian Institution Press, 238 p.Google Scholar
Chang, S., Feng, Q., Clausen, S., and Zhang, L., 2017, Sponge spicules from the lower Cambrian in the Yanjiahe Formation, South China: The earliest biomineralizing sponge record: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 474, p. 3644.CrossRefGoogle Scholar
Chang, S., Feng, Q., and Zhang, L., 2018, New siliceous microfossils from the Terreneuvian Yanjiahe Formation, South China: The possible earliest radiolarian fossil record: Journal of Earth Science, v. 29, p. 912919.CrossRefGoogle Scholar
Chen, M., 1982, The new knowledge of the fossils assemblages from Maidiping Section, Emei County, Sichuan with reference to the Sinian–Cambrian Boundary: Scientia Geologica Sinica, no. 3, p. 253263. [in Chinese with English abstract]Google Scholar
Chen, M., Xiao, Z., and Yuan, X., 1994, A new assemblage of megafossils–Miaohe biota from upper Sinian Doushantuo Formation, Yangtze Gorges: Acta Palaeontologica Sinica, v. 33, 391403. [in Chinese with English abstract]Google Scholar
Chen, P., 1984, Discovery of lower Cambrian small shelly fossils from Jijiapo, Yichang, west Hubei and its significance: Professional Papers of Stratigraphy and Palaeontology, v. 13, p. 4964. [in Chinese with English abstract]Google Scholar
Conway Morris, S., and Chen, M., 1992, Carinachitids, hexaconulariids, and Punctatus: Problematic metazoans from the early Cambrian of South China: Journal of Paleontology, v. 66, p. 384406.CrossRefGoogle Scholar
Cox, L.R., et al. , 1969, Bivalvia, in Moore, R.C., and Teichert, C., eds., Treatise on Invertebrate Paleontology, Part N, Mollusca 6, Volume 1: New York, New York, and Lawrence, Kansas, Geological Society of America and University of Kansas Press, 952 p.Google Scholar
Ding, L., Li, Y., and Chen, H., 1992, Discovery of Micrhystridium regulare from Sinian–Cambrian boundary strata in Yichang, Hubei, and its stratigraphic significance: Acta Micropalaeontologica Sinica, v. 9, p. 303309. [in Chinese with English abstract]Google Scholar
Dong, L., Xiao, S., Shen, B., Zhou, C., Li, G., and Yao, J., 2009, Basal Cambrian microfossils from the Yangtze Gorges area (South China) and the Aksu area (Tarim Block, northwestern China): Journal of Paleontology, v. 83, p. 3044.CrossRefGoogle Scholar
Dong, X., Cunningham, J.A., Bengtson, S., Thomas, C.W., Liu, J., Stampanoni, M., and Donoghue, P.C.J., 2013, Embryos, polyps and medusae of the early Cambrian scyphozoan Olivooides: Proceedings of the Royal Society B: Biological Sciences, v. 280, 20130071.CrossRefGoogle ScholarPubMed
Dong, X., Vargas, K., Cunningham, J.A., Zhang, H., Liu, T., Chen, F., Liu, J., Bengtson, S., and Donoghue, P.C.J., 2016, Developmental biology of the early Cambrian cnidarian Olivooides: Palaeontology, v. 59, p. 387407.CrossRefGoogle Scholar
Duan, B., Dong, X., Porras, L., Vargas, K., Cunningham, J.A., and Donoghue, P.C.J., 2017, The early Cambrian fossil embryo Pseudooides is a direct-developing cnidarian, not an early ecdysozoan: Proceedings of the Royal Society B: Biological Sciences, v. 284, 20172188.Google Scholar
Erwin, D.H., Laflamme, M., Tweedt, S.M., Sperling, E.A., Pisani, D., and Peterson, K.J., 2011, The Cambrian conundrum: Early divergence and later ecological success in the early history of animals: Science, v. 334, p. 10911097.CrossRefGoogle ScholarPubMed
Ford, R.C., Van Iten, H., and Clark, G.R., 2016, Microstructure and composition of the periderm of conulariids: Journal of Paleontology, v. 90, p. 389399.CrossRefGoogle Scholar
Guo, J., Li, Y., Han, J., Zhang, X., Zhang, Z., Ou, Q., Liu, J., Shu, D., Maruyama, S., and Komiya, T., 2008, Fossil association from the lower Cambrian Yanjiahe Formation in the Yangtze Gorges Area, Hubei, South China: Acta Geologica Sinica (English edition), v. 82, p. 11241132.Google Scholar
Guo, J., Li, Y., Han, J., Zhang, X., Zhang, Z., Ou, Q., and Shu, D., 2009, Discovery of Genus Protoconites Chen et al., 1994 from Yanjiahe Formation, Terreneuvian of the Three Gorge area, South China: Progress in Natural Science, v. 19, p. 180184. [in Chinese]Google Scholar
Guo, J., Li, Y., and Shu, D., 2010, Fossil macroscopic algae from the Yanjiahe Formation, Terreneuvian of the Three Gorge area, South China: Acta Palaeontologica Sinica, v. 49, p. 336342. [in Chinese with English abstract]CrossRefGoogle Scholar
Guo, J., Li, Y., Han, H., Ou, Q., Zhou, J., and Zheng, Y., 2012, New macroscopic problematic fossil from the early Cambrian Yanjiahe Biota, Yichang, Hubei, China: Acta Geologica Sinica (English edition), v. 86, p. 791798.Google Scholar
Guo, J., Li, Y., and Li, G., 2014, Small shelly fossils from the early Cambrian Yanjiahe Formation, Yichang, Hubei, China: Gondwana Research, v. 25, 9991007.CrossRefGoogle Scholar
Han, J., Kubota, S., Li, G., Yao, X., Yang, X., et al. , 2013, Early Cambrian pentamerous cubozoan embryos from South China: PLoS One, v. 8, e70741.Google ScholarPubMed
Han, J., Hu, S., Cartwright, P., Zhao, F., Ou, Q., Kubota, S., Wang, X., and Yang, X., 2016a, The earliest pelagic jellyfish with rhopalia from Cambrian Chengjiang Lagerstätte: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 449, p. 166173.CrossRefGoogle Scholar
Han, J., Kubota, S., Li, G., Ou, Q., Wang, X., et al. , 2016b, Divergent evolution of medusozoan symmetric patterns: Evidence from the microanatomy of Cambrian tetramerous cubozoans from South China: Gondwana Research, v. 31, p. 150163.CrossRefGoogle Scholar
Han, J., Li, G., Kubota, S., Ou, Q., Toshino, S., et al. , 2016c, Internal microanatomy and zoological affinity of the early Cambrian Olivooides: Acta Geologica Sinica (English edition), v. 90, p. 3865.Google Scholar
Han, J., Li, G., Wang, X., Yang, X., Guo, J., Sasaki, O., and Komiya, T., 2018, Olivooides-like tube aperture in early Cambrian carinachitids (Medusozoa, Cnidaria): Journal of Paleontology, v. 92, p. 313.CrossRefGoogle Scholar
He, T., 1987, Early Cambrian conulariids from Yangtze platform and their early evolution: Journal of Chengdu College of Geology, v. 14, p. 718. [in Chinese with English abstract]Google Scholar
He, Y., and Yang, X., 1986, Early Cambrian coelenterates from Nanjiang, Sichuan: Bulletin of the Chengdu Institute of Geological and Mineral Resources, Chinese Academy of Geological Sciences, no. 7, p. 3143. [in Chinese with English abstract]Google Scholar
Leme, J.D.M., Simoes, M.G., Marques, A.C., and Van Iten, H., 2008, Cladistic analysis of the suborder Conulariina Miller and Gurley, 1896 (Cnidaria, Scyphozoa; Vendian–Triassic): Palaeontology, v. 51, p. 649662.CrossRefGoogle Scholar
Liu, Y., Li, Y., Shao, T., Zheng, X., Zheng, J., Wang, G., Wang, H., and Wang, K., 2011, A new genus and species of protoconulariids from the early Cambrian in the south Shaanxi, China: Acta Micropalaeontologica Sinica, v. 28, 245249. [in Chinese with English abstract]Google Scholar
Liu, Y., Li, Y., Shao, T., Zhang, H., Wang, Q., and Qiao, J., 2014, Quadrapyrgites from the lower Cambrian of South China: Growth pattern, post-embryonic development, and affinity: Chinese Science Bulletin, v. 59, p. 40864095.CrossRefGoogle Scholar
Moore, R.C., and Harrington, H.J., 1956, Conulata, in Moore, R.C., ed. Treatise on Invertebrate Paleontology, Part F, Coelenterata: New York, New York, and Lawrence, Kansas, Geological Society of America and University of Kansas Press, p. F54F66.Google Scholar
Petersen, K.W., 1979, Development of coloniality in Hydrozoa, in Larwood, G., and Rosen, B., eds., Biology and systematics of colonial organisms: Symposium Systematic Association, special volume, 11, p. 105139.Google Scholar
Rozanov, A.Y., et al. , 1969, The Tommotian Stage and the Cambrian lower boundary problem: Trudy Geologičeskogo Instituta, Akademiâ Nauk SSSR 206, 380 p. [in Russian]Google Scholar
Shang, X., Liu, P., Yang, B., Chen, S., and Wang, C., 2016, Ecology and phylogenetic affinity of the early Cambrian tubular microfossil Megathrix longus: Palaeontology, v. 59, 1328.CrossRefGoogle Scholar
Shao, T., Liu, Y., Duan, B., Zhang, H., Zhang, H., Wang, Q., Zhang, Y., and Qin, J., 2018, The Fortunian (lowermost Cambrian) Qinscyphus necopinus (Cnidaria, Scyphozoa, Coronatae) underwent direct development: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 289, p. 149159.CrossRefGoogle Scholar
Steiner, M., Li, G., Qian, Y., and Zhu, M., 2004, Lower Cambrian small shelly fossils of northern Sichuan and southern Shaanxi (China), and their biostratigraphic importance: Geobios, v. 37, p. 259275.CrossRefGoogle Scholar
Steiner, M., Qian, Y., Li, G., Hagadorn, J.W., and Zhu, M., 2014, The developmental cycles of early Cambrian Olivooidae fam. nov. (?Cycloneuralia) from the Yangtze Platform (China): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 398, p. 97124.CrossRefGoogle Scholar
Van Iten, H, 1992, Morphology and phylogenetic significance of the corners and midlines of the conulariid test: Palaeontology, v. 35, p. 335358.Google Scholar
Van Iten, H., Zhu, M., and Li, G., 2010, Redescription of Hexaconularia He and Yang, 1986 (lower Cambrian, South China): Implications for the affinities of conulariid-like small shelly fossils: Palaeontology, v. 53, p. 191199.CrossRefGoogle Scholar
Verrill, A.E., 1865, Classification of polyps (extract condensed from Synopsis of the Polyps and Corals of the North Pacific Exploring Expedition under Commodore C. Ringgold and Captain John Rogers, U. S. N.): Communications of the Essex Institute, v. 4, p. 145152.Google Scholar
Wang, X., Han, J., Vannier, J., Ou, Q., Yang, X., Uesugi, K., Sasaki, O., Komiya, T., and Sevastopulo, G., 2017, Anatomy and affinities of a new 535-million-year-old medusozoan from the Kuanchuanpu Formation, South China: Palaeontology, v. 60, p. 853867.CrossRefGoogle Scholar
Werner, B., 1973, New investigations on systematics and evolution of the class Scyphozoa and the phylum Cnidaria: Publications of the Seto Marine Biological Laboratory, v. 20, p. 3561.CrossRefGoogle Scholar
Xian, X., Zhang, H., Liu, Y., and Zhang, Y., 2018, Diverse radial symmetry among the Cambrian Fortunian fossil embryos from northern Sichuan and southern Shaanxi Provinces, South China: Palaeoworld, https://doi.org/10.1016/j.palwor.2018.10.006. [online preprint]CrossRefGoogle Scholar
Xue, Y., Tang, T., and Yu, C., 1992, Discovery of the oldest skeletal fossils from upper Sinian Doushantuo Formation in Weng'an, Guizhou, and its significance: Acta Palaeontologica Sinica, v. 31, p. 530539. [in Chinese with English abstract]Google Scholar
Yao, J., Xiao, S., Yin, L., Li, G., and Yuan, X., 2005, Basal Cambrian microfossils from the Yurtus and Xishanblaq formations (Tarim, north-west China): Systematic revision and biostratigraphic correlation of Micrhystridium-like acritarchs from China: Palaeontology, v. 48, p. 687708.CrossRefGoogle Scholar
Yin, L., 1987, Microbiotas of latest Precambrian sequences in China, in Nanjing Institute of Geology and Palaeontology, ed., Stratigraphy and Palaeontology of Systemic Boundaries in China: Precambrian–Cambrian Boundary 1: Nanjing, Nanjing University Press, p. 415494.Google Scholar
Zhang, Z., Robson, S.P., Emig, C., and Shu, D., 2008, Early Cambrian radiation of brachiopods: A perspective from South China: Gondwana Research, v. 14, 241254.Google Scholar
Zhu, M., Zhang, J., Steiner, M., Yang, A., Li, G., and Erdtmann, B.D., 2003, Sinian-Cambrian stratigraphic framework for shallow- to deep-water environments of the Yangtze Platform: An integrated approach: Progress in Natural Science, v. 13, p. 951960.Google Scholar
Zhu, M., Yang, A., Yuan, J., Li, G., Zhang, J., Zhao, F., Ahn, S.Y., and Miao, L., 2019, Cambrian integrative stratigraphy and timescale of China: Science China Earth Sciences, v. 62, p. 2560.CrossRefGoogle Scholar
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A fourteen-faced hexangulaconulariid from the early Cambrian (Stage 2) Yanjiahe Formation, South China
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