Figure 1
From: Hybridization produces novelty when the mapping of form to function is many to one
The components of the 4-bar linkage system are illustrated on cleared and stained cichlid heads of (A) Copadichromis eucinostomus (representative high KT) and (B) Chilotilapia rhoadesii (representative low KT). Yellow is the lower jaw (input) link; black is the fixed link, blue is the nasal link and green is the maxillary (output) link. Note differences in relative lengths of input and output links for these high and low KT exemplars.