Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-19T11:46:50.100Z Has data issue: false hasContentIssue false
  • English
  • Français

Early Cambrian trilobite larvae and ontogeny of Ichangia ichangensis Chang, 1957 (Protolenidae) from Henan, China

Published online by Cambridge University Press:  20 May 2016

Xi-Guang Zhang  and
Brian R. Pratt
Xi-Guang Zhang
Affiliation:
Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada
Brian R. Pratt
Affiliation:
Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada
Get access Rights & Permissions [Opens in a new window]

Abstract

The Lower Cambrian Shuigoukou Formation of Xichuan, Henan province, China, yielded phosphatized instars belonging to the protolenid Ichangia ichangensis Chang, 1957, and two undetermined taxa. With relatively simple body plans, the three larval forms resemble each other to some extent, and protaspides of I. ichangensis show general similarities to those of the ellipsocephalid Palaeolenus lantenoisi Mansuy. However, their early ontogenetic processes exhibit subtle yet distinct differences. One group of unassigned protaspides possesses a sagittal glabellar furrow and protomarginal spines with branching extremities. The other unassigned protaspides bear especially long genal and protomarginal spines. The detailed preservation of these larvae reveals delicate structural variations that help provide a framework for evaluating relationships among Early Cambrian trilobites.

Type
Research Article
Information
Journal of Paleontology , Volume 73 , Issue 1 , January 1999 , pp. 117 - 128
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barrande, J. 1852. Systěme Silurien du centre de la Bohěme l ère partie. Recherches paléontologiques, volume 1. Crustacés: Trilobites. Prague and Paris, 197 p.Google Scholar
Bowring, S. A., Grotzinger, J. P., Isachsen, C. E., Knoll, A. H., Pelechaty, S. M., and Kolosov, P. 1993. Calibrating rates of early Cambrian evolution. Science, 261:1293–1298.CrossRefGoogle ScholarPubMed
Chang, W. T. 1957. Cambrian and Ordovician stratigraphy of the gorge district of the Yangtze, Hupeh. Kexue Tongbao, 5:145.Google Scholar
Chatterton, B. D. E. 1980. Ontogenetic studies of Middle Ordovician trilobites from the Esbataottine Formation, Mackenzie Mountains, Canada. Palaeontographica, Abt. A, 171:1–74.Google Scholar
Chatterton, B. D. E., Siveter, D. J., Edgecombe, G. D., and Hunt, A. S. 1990. Larvae and relationships of the Calymenina (Trilobita). Journal of Paleontology, 64:255–277.Google Scholar
Demeter, E. J. 1973. Lower Ordovician pliomerid trilobites from western Utah. Brigham Young University Geology Studies, 20:35–65.Google Scholar
Edgecombe, G. D., Speyer, S. E., and Chatterton, B. D. E. 1988. Protaspid larvae and phylogenetics of encrinurid trilobites. Journal of Paleontology, 62:779–799.Google Scholar
Feist, R. 1970. Breviscutellum (Meridioscutellum) n. sg. (Trilobita) et son développement larvaire. Géobios, 3:41–73.Google Scholar
Fortey, R. A. 1990. Ontogeny, hypostome attachment and trilobite classification. Palaeontology, 33:529–576.Google Scholar
Fortey, R. A., and Chatterton, B. D. E. 1988. Classification of the trilobite suborder Asaphina. Palaeontology, 31:165–222.Google Scholar
Fortey, R. A., and Whittington, H. B. 1989. The Trilobita as a natural group. Historical Biology, 2:125–138.Google Scholar
Harrington, H. J. 1959. General description of Trilobita. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology, Part O, Arthropoda 1. O38-O117. Geological Society of America and University of Kansas Press, Lawrence.Google Scholar
Hu, C. H. 1971. Ontogeny and sexual dimorphism of Lower Paleozoic Trilobita. Palaeontographica Americana, 7:31–155.Google Scholar
Kobayashi, T., and Kato, F. 1951. On the ontogeny and ventral morphology of Redlichia chinensis with description of Alutella nakamurai, new gen. and sp. Journal of the Faculty of Science, Imperial University of Tokyo (ser. 2), 8:100–143.Google Scholar
Lee, D.-C., and Chatterton, B. D. E. 1996. Terminology of glabellar lobes in trilobite larvae based on homology. Journal of Paleontology, 70:439–442.Google Scholar
Lee, D.-C., and Chatterton, B. D. E. 1997. Ontogenies of trilobites from the Lower Ordovician Garden City Formation of Idaho and their implications for the phylogeny of the Cheirurina. Journal of Paleontology, 71:683–702.CrossRefGoogle Scholar
Lu, Y.-H. 1940. On the ontogeny and phylogeny of Redlichia intermedia Lu (sp. nov.). Bulletin of the Geological Society of China, 20:333–342.Google Scholar
Lu, Y.-H., Zhang, W.-T., Zhu, Z.-L., Qiang, Y.-Y., and Xiang, L.-W. 1965. Chinese fossils of all groups, Chinese trilobites. Beijing, Science Press, 362p.Google Scholar
Pabian, R. K., and Fagerstrom, J. A. 1972. Late Paleozoic trilobites from southeastern Nebraska. Journal of Paleontology, 46:789–816.Google Scholar
Palmer, A. R. 1957. Ontogenetic development of two olenellid trilobites. Journal of Paleontology, 31:105–128.Google Scholar
Palmer, A. R. 1958. Morphology and ontogeny of a Lower Cambrian ptychoparioid trilobite from Nevada. Journal of Paleontology, 32:154–170.Google Scholar
Raw, F. 1925. The development of Leptoplastus salteri (Callaway) and of other trilobites. Geological Society of London, Quarterly Journal, 81:223–324.Google Scholar
Richter, R. 1932. Crustacea (Paläontologie). In Dittler, R., Joos, G., Korschelt, E., Linek, G., Oltmanns, F., Schaum, K. (eds.), Handwörterbuch der Naturwissenschaften, 2nd ed.Gustav Fisher. Jena. p. 840–864.Google Scholar
Richter, R. and Richter, E. 1948. Studien im Paläozoikum der Mittelmeer-Länder, 8, Zur Frage des Unter-Kambriums in Nordost-Spanien: Senckenbergiana 29:23–39.Google Scholar
Šnajdr, M. 1981. Ontogeny of some representatives of the trilobite genus Scharyia. Sborník geologickýck vëd, Paleontologie, 24:1–35.Google Scholar
Speyer, S. E., and Chatterton, B. D. E. 1989. Trilobite larvae and larval ecology. Historical Biology, 3:27–60.Google Scholar
Tripp, R. P., and Evitt, W. R. 1983. Silicified trilobites of the genus Dimeropyge from the Middle Ordovician of Virginia. Special Papers in Palaeontology, 30:229–240.Google Scholar
Whittington, H. B. 1957. The ontogeny of trilobites. Biological Reviews, 32:421–469.Google Scholar
Whittington, H. B. 1959. Ontogeny of Trilobita. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology Part O, Arthropoda 1:127–144. Geological Society of America and University of Kansas Press.Google Scholar
Whittington, H. B. 1988. Hypostomes of post-Cambrian trilobites. New Mexico Bureau of Mines & Resources, Memoir, 44:321–339.Google Scholar
Yi, D.-R. 1988. Ontogeny of Palaeolenus lantenoisi (Trilobita). Acta Palaeontologica Sinica, 27:31–38.Google Scholar
Zhang, W.-T., Lu, Y.-H., Zhu, Z.-L., Qian, Y.-Y., Lin, H.-L., Zhou, Z.-Y., Zhang, S.-G., and Yuan, J.-L. 1980. Cambrian trilobite faunas of southwestern China. Palaeontologia Sinica, n. ser. C, 16:1–497.Google Scholar
Zhang, X.-G. 1987. Moult stages and dimorphism of Early Cambrian bradoriids from Xichuan, Henan, China. Alcheringa, 11:1–19.CrossRefGoogle Scholar
Zhang, X.-G. 1989. Ontogeny of an Early Cambrian eodiscoid trilobite from Henan, China. Lethaia, 22:13–29.Google Scholar
Zhang, X.-G. 1998. Cambrian phosphatized fossils from southern China and their bearing on early metazoan evolution. Unpublished , , 165 p.Google Scholar
Zhang, X.-G., and Clarkson, E. N. K. 1993. Ontogeny of the eodiscid trilobite Shizhudiscus longquanensis from the Lower Cambrian of China: Palaeontology, 36:785–806.Google Scholar
Zhou, Z.-Y., and Yuan, J.-L. 1980. Lower Cambrian trilobite succession in Southwest China. Acta Palaeontologica Sinica, 19:331–339.Google Scholar