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Evolutionary relationships of cartilaginous fishes: an immunological study
Author(s) -
Lawson R.,
Burch S.J.,
Ooughterson S. M.,
Heath S.,
Davies D. H.
Publication year - 1995
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.1995.tb02749.x
Subject(s) - biology , phylogenetic tree , dendrogram , sister group , transferrin , zoology , evolutionary biology , clade , genetics , gene , biochemistry , population , demography , sociology , genetic diversity
An investigation of the phylogenetic relationships of a number of cartilaginous fish based on the use of the immunological properties of the iron‐binding serum protein, transferrin. is presented. Data on immunological distance and the rate of amino acid substitution are used to produce a dendrogram. The tree confirms the close relationships of the holocephalan species examined which are a sister group of other neoselachians. The tree also indicates that the squaloids and galeoids are separate groups and that Heterodontus belongs with the galeoids. It is also clear that the divergence between the squaloids, galeoids (including Heterodontus ) and the Holocephali is an ancient one and that the rajids probably diverged from this basal stock rather than any more recent squaloid/squatinoid/galeoid grouping.