Hostname: page-component-745bb68f8f-d8cs5 Total loading time: 0 Render date: 2025-01-09T03:52:01.365Z Has data issue: false hasContentIssue false
  • English
  • Français

The Sweetognathus complex in the Permian of China: implications for evolution and homeomorphy

Published online by Cambridge University Press:  14 July 2015

Wang Cheng-Yuan ,
Scott M. Ritter  and
David L. Clark
Wang Cheng-Yuan
Affiliation:
Nanjing Institute of Geology and Paleontology, Academia Sinica, Nanjing
Scott M. Ritter
Affiliation:
Department of Geology, Oklahoma State University, Stillwater 74074
David L. Clark
Affiliation:
Department of Geology and Geophysics, University of Wisconsin, Madison 53706
Get access Rights & Permissions [Opens in a new window]

Abstract

The well-exposed and fossiliferous Permian carbonates in China have yielded Early and Late Permian species of the Sweetognathus complex that permit worldwide stratigraphic evaluation of members of the group. The sporadic appearance of species of Sweetognathus and related genera throughout the Permian in western North America and Iran, in particular, may represent iterative evolution and homeomorphy. The pectiniform element morphologies of the several species are interpreted as most important for evolutionary studies and document a partial Permian biostratigraphy in China that aids in the interpretation of less complete sequences elsewhere. A new genus, Pseudosweetognathus, and four new species, Pseudosweetognathus costatus, Sweetognathus subsymmetricus, S. paraguizhouensis, and Iranognathus nudus, are described.

Type
Research Article
Information
Journal of Paleontology , Volume 61 , Issue 5 , September 1987 , pp. 1047 - 1057
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

Bando, Y., et al. 1982. Some remarks on the conodont zonation and stratigraphy of the Permian, p. 1–53. In Gupta, V. J. (ed.), Recent Researches in Geology, 8. Hindustan Publishers, Delhi, India.Google Scholar
Behnken, F. H. 1975. Leonardian and Guadalupian (Permian) conodont biostratigraphy in western and northwestern United States. Journal of Paleontology, 49:284–315.Google Scholar
Clark, D. L. 1972. Early Permian crisis and its bearing on Permo-Triassic conodont taxonomy. Geologica et Palaeontologica, SB 1:147–158.Google Scholar
Clark, D. L. and Behnken, F. H. 1971. Conodonts and biostratigraphy of the Permian, p. 415–439. In Sweet, W. C. and Bergström, S. M. (eds.), Symposium on Conodont Biostratigraphy. Geological Society of America Memoir 127.Google Scholar
Clark, D. L. et al. 1979. Permian conodont biostratigraphy in the Great Basin, p. 143–147. In Sandberg, C. A. and Clark, D. L. (eds.), Conodont Biostratigraphy of the Great Basin and Rocky Mountains. Brigham Young University Geology Studies, 26.Google Scholar
Igo, H. 1981. Permian conodont biostratigraphy of Japan. Palaeontological Society of Japan Special Paper 24, 50 p.Google Scholar
Kozur, H. 1977. Beiträge zur Stratigraphie des Perms: Teil I. Probleme der Abgrenzung und Gliederung des Perms. Freiberger Forschungsheft, 319:79–121.Google Scholar
Kozur, H. 1978. Beiträge zur Stratigraphie des Perms: Teil II. Conodonten chronologie des Perms. Freiberger Forschungsheft, 334:85–161.Google Scholar
Kozur, H., Mostler, H., and Rahimi-Yazd, A. 1975. Beiträge zur Mikrofauna permotriadischa Schichtfolgen teil II; Neue Conodonten aus dem oberperm und der basalen trias von Nord- und Zentraliran. Geologisches-Paläontologisches Mitteilungen Innsbruck, 5:1–23.Google Scholar
Rhodes, F. H. T. 1963. Conodonts from the topmost Tensleep Sandstone of the eastern Big Horn Mountains, Wyoming. Journal of Paleontology, 37:401–408.Google Scholar
Ritter, S. M. 1985. Evolutionary factors and the establishment of Early Permian conodont communities. Geological Society of America, Abstracts with Programs, 17(7):701.Google Scholar
Ritter, S. M. 1986. Taxonomic revision and phylogeny of post-Early Permian crisis bisselli-whitei Zone conodonts with comments on late Paleozoic diversity. Geologica et Palaeontologica, 20:139–165.Google Scholar
Sheng, J. Z., and Wang, Y. J. 1985. Fossil Radiolaria from Kufeng Formation at Longtang, Nanjing. Acta Palaeontologica Sinica, 24:17–180.Google Scholar
Tian, C. R. 1983. Permian conodonts, p. 338–344, 407. In Handbook of Paleontology in SW China (Pt. IV, Micropaleontology). Geoscience Press, Beijing. (In Chinese.)Google Scholar
Wang, C. Y., and Wang, Z. H. 1981. Permian conodont biostratigraphy of China, p. 227–236. In Teichert, C., Lu, L., and Chen, P. J. (eds.), Paleontology in China 1979. Geological Society of America Special Paper 187.Google Scholar
Wang, Z. H. 1978. Permian-Lower Triassic conodonts of the Liangshan area, southern Shanxi. Acta Palaeontologica Sinica, 17:213–227.Google Scholar
Zhao, Z. X., Han, J. X., and Wang, Z. J. 1984. The Carboniferous strata and its fauna from southwest margin of Tarim Basin in Xinjiang. Geoscience Press, Beijing.Google Scholar