Systematics and palaeobiology of some Cambrian hyoliths from Guizhou,China, and Nevada,USA

Sun, H., Babcock, L.E., Peng, J. &; Kastigar, J.M., July 2016. Systematics and palaeobiology of some Cambrian hyoliths from Guizhou, China, and Nevada, USA. Alcheringa 41, xxx–xxx. ISSN 0311-5518.

Hyoliths constitute one of the most important groups of early biomineralized metazoans. Abundant hyolith specimens, comprising both hyolithides and orthothecides, from the Balang Formation (Cambrian Stage 4), Guizhou, China, and the Poleta Formation (Cambrian Stages 3–4), Pioche Formation (Stages 4–5) and Emigrant Formation (Stages 4–5) Nevada, USA, add to the early Palaeozoic record of hyoliths from South China and Laurentia, and provide new taxonomic, taphonomic and palaeoecologic information about this group. Hyoliths from the Balang Formation include the hyolithides ‘Ambrolinevitus’ maximus Jiang, 1982, Galicornus seeneus? Val’kov, 1975 Val’kov, A.K., 1975. Biostratigrafiya i khiolity kembriya severovostoka Sibirskoe platformy [Cambrian biostratigraphy and hyoliths of the northeastern Siberian Platform]. Akademiya Nauka SSSR, Moscow, 139 pp. (in Russian) [Google Scholar], Haplophrentis reesei Babcock &; Robison, 1988 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, Paper 121, 1–22. [Google Scholar], ‘Linevitus’ guizhouensis sp. nov., Meitanovitus guanyindongensis Qian, 1978 Qian, Y., 1978. The Early Cambrian hyolithids in central and southwest China and their stratigraphical significance. Nanjing Institute of Geology and Palaeontology, Academia Sinica Memoir 11, 1–38. (in Chinese with English abstract) [Google Scholar], undetermined forms, and undetermined orthothecides. Hyoliths from Nevada include the hyolithides Haplophrentis carinatus (Matthew, 1899 Matthew, G.F., 1899. Studies on Cambrian faunas, No. 3—Upper Cambrian fauna of Mount Stephen, British Columbia—the trilobites and worms. Transactions of the Royal Society of Canada, Series 2, 5, 39–66. [Google Scholar]), Nevadotheca whitei (Resser, 1938 Resser, C.E., 1938. Fourth contribution to the study of Cambrian fossils. Smithsonian Miscellaneous Collections 97(10), 1–43. [Google Scholar]), an undetermined form, and undetermined orthothecides. In the Balang Formation, eocrinoids have been found attached to hyolithide conchs, which supports the view that hyolithides were benthic animals.

Haijing Sun* [hjsun1987@163.com], Resources and Environmental Engineering College, Guizhou University, Guiyang 550025, PR China; Loren E. Babcock? corresponding author [babcockloren@gmail.com], School of Earth Sciences, The Ohio State University, Columbus, OH 43210, USA; Jin Peng corresponding author [gzpengjin@126.com], Resources and Environmental Engineering College, Guizhou University, Guiyang 550025, PR China; Jessica M. Kastigar [kastigar.2@osu.edu], School of Earth Sciences, The Ohio State University, Columbus, OH 43210, USA. *Also affiliated with Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, PR China. ?Also affiliated with Department of Geology, Lund University, Sölvegatan 12, SE-223 62 Lund, Sweden.     

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