Get access

Phylogeny of the conodont genera Hindeodus and Isarcicella across the Permian–Triassic boundary

Authors

  • HAISHUI JIANG,

  • RICHARD J. ALDRIDGE,

  • XULONG LAI,

  • CHUNBO YAN,

  • YADONG SUN


Haishui Jiang [jiangliuis@hotmail.com] and Xulong Lai [xllai@.cug.edu.cn], Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China and Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China; Chunbo Yan [yanchunbo123@163.com] and Yadong Sun [sydlion@163.com], Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China; Richard J. Aldridge [ra12@le.ac.uk], Department of Geology, University of Leicester, Leicester LE1 7RH, UK; manuscript received on 31/03/2010; manuscript accepted on 16/08/2010.

Abstract

Jiang, H., Aldridge, R.J., Lai, X., Yan, C. & Sun, Y. 2010: Phylogeny of the conodont genera Hindeodus and Isarcicella across the Permian–Triassic boundary. Lethaia, Vol. 44, pp. 374–382.

Several phylogenetic hypotheses have been put forward to explain the relationships between species of the conodont genera Hindeodus and Isarcicella across the Permian–Triassic boundary. These phylogenetic models can be tested by cladistic analysis. A data matrix of 25 P1 element characters for 22 species of Hindeodus and Isarcicella has been analysed and the resulting cladogram converted to a phylogenetic tree using the ranges of taxa in the Meishan Section, China. The proposed phylogeny does not concur entirely with any of those forwarded in the previous literature, and Hindeodus parvus is not resolved as a direct descendant of Hindeodus praeparvus. Species assigned to the genus Isarcicella form a natural group, with Hindeodus species apparently representing a paraphyletic array. The Hindeodus Isarcicella clade survived the end-Permian extinction event well, with Hindeodus species that became extinct just above the boundary replaced by radiation within the Isarcicella clade. □Cladistics, conodonts, phylogeny, Permian, Triassic.

Get access to the full text of this article

Ancillary