Figure 4 in A new Thai Mesozoic lungfish (Sarcopterygii, Dipnoi) with an insight into post-Palaeozoic dipnoan evolution

Figure 4. Semi-schematic drawings of the skulls of various taxa mentioned in the text. The sensory lines and canals are shown on the left part of the skull roofs with bold lines (canals above the bones) and dotted lines (canals bone-enclosed). Grey tone indicates cartilage (in dorsal views only) and shading tone indicates mineralization of the 'hard snout'.