© 1981 by The Society for Integrative and Comparative Biology
A Functional Approach to the Phylogeny of the Pharyngognath Teleosts1
Musem of Comparative Zoology, Harvard University Cambridge, Massachusetts 02138
Department of Zoology, British Museum (Natural History) London SW7 5BD, England
SYNOPSIS. Functional morphological analysis has revealed the existence of three functionally and morphologically different mechanisms underlying the tongue-parasphenoid and pharyngeal-parasphenoid bites in advanced teleost fishes. The bite is specialized differently in Pristolepis and the Anabantoidei, and in a primitive condition in both the Nandidae andChanniformes. These taxa belong to at least three unrelated lineages and do not share a commonancestry as was previously postulated. It has been possible to show how an originally primitive character can acquire a new biological and phylogenetic meaning by being integrated into a specialized functional complex. Based on functional data on the pharyngeal jaw apparatus, a new hypothesis is proposed stating that the Cichlidae, Embiotocidae, Labridae, Odacidae and Scaridae represent a monophyletic assemblage. This case study has demonstrated that reciprocal illumination of functional morphological and phylogenetic findings can lead to: (1) better tested and more precise phylogenetic hypotheses; (2) the construction of new hypotheses on the basis of specialized character complexes which were unrecognized by the use of a purely descriptive morphological approach