Fig. 1. Phylogeny of the major taxa of Actinopterygii (based on Nelson, 1994). A representative example of each group is shown for each taxon. The colour of each fish indicates the percentage of species having cellular bone (red) or acellular bone (green). This figure is based on data from over 500 species. Data is taken mainly from Kölliker (1859) and Moss (1961, 1965), with some additional data from Meunier (1989), Meunier and Huysseune (1992) and Sire et al. (1990). Numbers next to each taxon indicate counted number of species with cellular bone (red) and acellular bone (green).