Fig. 5. Schematics of relative antennule lengths mapped onto a palinurid phylogeny. Medial flagellum is towards the top of the figure. The antennule lengths were divided by body size to show proportional differences across taxa. The phylogeny is modified from a morphological phylogeny (S. N. Patek and T. H. Oakley, submitted). The phylogenetic relationships of the Palinuridae have proved difficult to resolve, possibly due to fast radiations over ancient time scales (Patek, 2001); morphological and molecular rDNA sequence data have not consistently resolved genus-level relationships (Baisre, 1994; Patek, 2001; S. N. Patek and T. H. Oakley, submitted). Homarus americanus (Nephropidae), Scyllarus arctus (Scyllaridae) and Parribacus antarcticus (Scyllaridae) are included for outgroup comparisons.