Figure 4From: Contribution to the study of acoustic communication in two Belgian river bullheads (Cottus rhenanus and C. perifretum) with further insight into the sound-producing mechanismMorphology of the neurocranium and pectoral girdle in Cottus perifretum . Dorsal view of the skeletal elements of the pectoral girdle (left) and the different muscles involved in pectoral girdle adduction (right). pt, post-temporal; cl, cleithrum.Back to article page