Abstract
AMONG the living fishes, groups of widely different phylogenetic antiquity may be classified by equally diverse sets of characteristics, both morphometric and biochemical. One such character that has been used in the study of the relationships between the major groups is cellular DNA content. It is now well known that, among fishes, modern teleosts have the lowest diploid levels (as low as 0.8 pg) and that elasmobranchs have somewhat intermediate levels (3–15 pg). The Dipnoi have the highest levels among living vertebrates (160–285 pg), and these values are approached most closely by some (but by no means all) Amphibia, such as Necturus and Amphiuma (205 and 192 pg respectively)1,2.
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THOMSON, K., GALL, J. & COGGINS, L. Nuclear DNA Contents of Coelacanth Erythrocytes. Nature 241, 126 (1973). https://doi.org/10.1038/241126a0
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DOI: https://doi.org/10.1038/241126a0
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