Distribution of canal neuromasts in the dermatocranial bones containing supraorbital and mandibular lateral line canals. Schematic representation of the morphology of the supraorbital (A) and mandibular (B) canals as used for the evaluation of the modular organization of the cranial lateral line canal system. A) Five canal neuromasts are contained within the supraorbital canal, which is composed of canal portions in the nasal (SO1) and frontal (SO2 to SO5) bones including five canal segments (SO1 to SO5). B) Five canal neuromasts are contained within the mandibular canal, which is composed of canal portions in the dentary (MD1 to MD4) and anguloarticular (MD5) bones including five canal segments (MD1 to MD5). Black = bone, Gray = general epithelium and neuromasts. Note that pores are located between canal segments (see Figure 2), and that bone is lacking between portions at the articulation of adjacent dermatocranial bones.