Skip to main content
×
×
Home

An obolellate brachiopod with soft-part preservation from the Early Cambrian Chengjiang fauna of China

  • Zhifei Zhang (a1), Lars E. Holmer (a2), Leonid Popov (a3) and Degan Shu (a1)
Abstract

The obolellates represent a poorly understood group of the oldest known cosmopolitan calcareous rhynchonelliform brachiopods. They made their first appearance in the early Atdabanian and became extinct at the end of the Middle Cambrian. Consequently, any information concerning the soft anatomy of this ephemeral lineage of brachiopods has great phylogenetic significance. This is the first report on two specimens of an obolellate with fine preservation of soft parts including the pedicle, marginal setae and possible imprints of a spiral lophophore, recovered from the early Cambrian Chengjiang Konservat Lagerstätte of Kunming, southern China. The setae are thin and densely fringed along the shell margin. The stout pedicle is distinctly composed of densely stacked tabular bodies, lacking a central coelomic lumen; it emerges through a possible foramen, and slightly tapers posteriorly with the distal end attached to exoskeletons of other organisms.

Copyright
References
Hide All
Bassett, M. G., Popov, L. E., and Egerquist, E. 2008. Pedicle preservation in a Silurian rhynchonelliformean brachiopod from Herefordshire, England: soft-tissue or an artefact of interpretation? Transactions of the Royal Society of Edinburgh: Earth and Environmental Science, 98:303308.
Geyer, G. 1994. A new obolellid brachiopod from the Lower Cambrian of Morocco. Journal of Paleontology, 68:9951002.
Geyer, G. and Mergl, M. 1995. Mediterranean representatives of the obolellid Trematobolus Matthew (Brachiopoda) and a review of the genus. Paläontologische Zeischrift, 69:179209.
Holmer, L. E. and Caron, J. B. 2006. A spinose stem group brachiopod with pedicle from the Middle Cambrian Burgess Shale. Acta Zoologica, 87:273290.
Holmer, L. E., Stolk Pettersson, S., Skovsted, C. B., Balthasar, U., and Popov, L. E. 2009. The enigmatic Early Cambrian Salanygolina–A Stem group of Rhynchonelliform Chileate brachiopods? Palaeontology, 52:110.
Holmer, L. E., Skovsted, C. B., Brock, G. A., and Popov, L. E. In press. An Early Cambrian chileate brachiopod from South Australia and its phylogenetic significance. Memoirs of the Association of Australasian Palaeontologist.
Jin, Y. G., Hou, X. G., and Wang, H. Y. 1993. Lower Cambrian pediculate lingulids from Yunnan, China. Journal of Palaeontology, 67:788798.
Matthew, G. F. 1895. Traces of the Ordovician System on the Atlantic coast. Royal Society of Canada, Transactions, Ser. 1, sect. 4, p. 253279, 2 pl.
Pelman, Y. U. L. 1977. Ranne- i srednekembriiskie bezzamkovye brakhiopody Sibirskoi platformy: Akademiya Nauk SSSR, Sibirskoe otdelenie, Institut geologii i geofiziki (IGIG), Trudy, v. 316, 68 p., 24 pl., 22 text-fig. (Early and Middle Cambrian inarticulate brachiopods of the Siberian Platform).
Pettersson Stolk, S., Holmer, L. E., and Caron, J. B. 2010. First record of the brachiopod Lingulella waptaensis with pedicle from the Middle Cambrian Burgess Shale. Acta Zoologica, 91:150162.
Popov, L. E. and Holmer, L. E. 2000. Class Obolellata, p. 200208. In Kaesler, R. L. (ed.), Treatise on Invertebrate Paleontology, Part H, Brachiopoda. Vol. 2. The Geological Society of America (Boulder, Colorado) and The University of Kansas Boulder (Lawrence, Kansas).
Popov, L. E., Holmer, L. E., and Bassett, M. G. 1996. Radiation of the earliest calcareous brachiopods, p. 209213. In Copper, P. and Jin, J. (eds), Brachiopods. Proceedings of the Third International Brachiopod Congress, Sudbury, Ontario, Canada, 2-5 September, 1995.
Popov, L. E., Bassett, M. G., Holmer, L. E., Skovsted, C. B., and Yzuykov, M. A. 2010. Earliest ontogeny of early Palaeozoic Craniiformea: implications for brachiopod phylogeny. Lethaia, 43:323333.
Popov, L. E., Egerquist, E., and Holmer, L. E. 2007. Earliest ontogeny of Middle Ordovician rhynchonelliform brachiopods (Clitambonitoidea and Polytoechioidea): implications for brachiopod phylogeny. Lethaia, 40:8596.
Rowell, A. J., 1962. The genera of the brachiopod superfamilies Obolellacea and Siphonotretacea. Journal of Paleontology, 36:136152.
Rowell, A. J. 1965. Class Inarticulata, p. H260296. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Part H. Brachiopoda. Geological Society of America and University of Kansas Press, Lawrence, Kansas, 927 p.
Ushatinskaya, G. T. and Malakhovskaya, Ya. E. 2006. Pervyye brachiopody s karbonatnym skeletom: poyavleniye, rasseleniye, stroenie stenki rakoviny, p. 177192. In Rozhnov, S. N. (ed.), Evolyutsiya Buiosfery i bioraznoobraziya. K 70-letiyu Rozanova, A. Yu. Tovarishestvo nauchnykh izdanii KMK, Moscow, 600 p.
Walcott, C. D. 1890. The fauna of the Lower Cambrian or Olenellus Zone. United States Geological Survey, Annual Report, v. 10, pt. 1, p. 515774, pl. 50–98.
Walcott, C. D. 1908. Cambrian Geology and Paleontology, pt. 3—Cambrian Brachiopoda, descriptions of new genera and species: Smithsonian Miscellaneous Collections, v. 53, p. 53137, pl. 7-12.
Williams, A., Carlson, S. J., Brunton, C. H. C., Holmer, L. E., and Popov, L. E. 1996. A supra-ordinal classification of the Brachiopoda. Philosophical Transactions of the Royal Society: Biological Sciences, 35:11711193.
Zhang, Z. F., Han, J., Zhang, X. L., Liu, J. N., and Shu, D. G. 2003. Pediculate brachiopod Diandongia pista from the Lower Cambrian of South China. Acta Geologica Sinica (English Edition), 77:288293.
Zhang, Z. F., Han, J., Zhang, X. L., Liu, J. N., and Shu, D. G. 2004. Soft-tissue preservation in the Lower Cambrian linguloid brachiopod from South China. Acta Palaeontologica Polonica, 49:259266.
Zhang, Z. F., Shu, D. G., Han, J., and Liu, J. N. 2005. Morphoanatomical differences of the Early Cambrian Chengjiang and Recent linguloids and their implications. Acta Zoologica, 86:277288.
Zhang, Z. F., Shu, D. G., Emig, C. C., Zhang, X. L., Han, J., Liu, J. N., Li, Y., and Guo, J. F. 2007. Rhynchonelliformean brachiopods with soft-tissue preservation from the Lower Cambrian Chengjiang Lagerstätte of South China. Palaeontology, 50:13911402.
Zhang, Z. F., Robson, S. P., Shu, D. G., and Emig, C. C. 2008. Early Cambrian radiation of brachiopods: A perspective from South China. Gondwana Research, 14:241254.
Zhang, Z. F., Han, J., Wang, Y., Emig, C. C., and Shu, D. G. 2010. Epibionts on the lingulate brachiopod Diandongia from the Early Cambrian Chengjiang Lagerstatte, South China. Proceedings of Royal Society of London Proceedings, Series. B, 277:175181.
Zhang, Z. F., Holmer, L. E., Ou, Q., Han, J. and Shu, D. G. 2011. The exceptionally preserved Early Cambrian stem rhynchonelliform brachiopod Longtancunella and its implications. Lethaia (in press).
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 Geological Society of London, 158:211218.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
  • URL: /core/journals/journal-of-paleontology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed