Author： Ritchie P.A. Bargelloni L. Meyer A. Taylor J.A. Macdonald J.A. Lambert D.M.
Publisher： Academic Press
ISSN： 1055-7903
Source： Molecular Phylogenetics and Evolution, Vol.5, Iss.2, 1996-02, pp. : 383-390
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The subfamily of fishes Trematominae is endemic to the subzero waters of Antarctica and is part of the larger notothenioid radiation. Partial mitochondrial sequences from the 12S and 16S ribosomal RNA (rRNA) genes and a phylogeny for 10 trematomid species are presented. As has been previously suggested, two taxa, Trematomus scotti and T. newnesi, do not appear to be part of the main trematomid radiation. The genus Pagothenia is nested within the genus Trematomus and has evolved a unique cyropelagic existence, an association with pack ice. Using a mitochondrial rRNA molecular clock rate of 0.14% transversion changes per million years, the average age of the trematomids is estimated at 3.4 million years (MY). If the age of the tre- matomids is approximately 3.4 MY, this group could have speciated during a period of deglaciation in Antarctica 2.5-4.8 million years ago. This era was marked by significant changes on the Antarctic shores, such as the opening of fjords, which might have provided a stimulus for speciation.
Related content
Access to resources
Recommend
By Gilles A. Lecointre G. Faure E. Chappaz R. Brun G.
Molecular Phylogenetics and Evolution, Vol. 10, Iss. 1, 1998-08 ,pp. :
By Pondella II D.J. Craig M.T. Franck J.P.C.
Molecular Phylogenetics and Evolution, Vol. 29, Iss. 1, 2003-10 ,pp. :