cephalic sensory canals
the head canals opening to the surface in pores and containing neuromasts (sometimes the canals are lost and the neuromasts are exposed). Similar to the trunk lateral line in structure and function but having different innervation. The following canals may be present: supratemporal (abbreviated ST) running across the top of the head connecting the lateral branch of each side; the opercular (OP), an isolated canal on the anterior operculum; supraorbital (SO) above the eye and extending anteriorly to the nostrils; infraorbital (IO) below the eye and above the upper lip; preoperculo-mandibular (PM) along the preopercle and lower jaw. The pores on the lower jaw are sometimes referred to separately as mandibular pores. Individual pores are sometimes referred to separately by the name of the structure to which they are adjacent:- nasal, postmaxillary, interorbital, etc. The coronal pore is the median dorsal pore (COR) between the eyes formed by junction of branches from each supraorbital canal

Dictionary of ichthyology. 2009.

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  • sensory canal — lateral line (a tube like sensory organ (usually bearing pores) extending along the side of the body. Detects water movements, low frequency vibrations and perhaps temperature changes. In some fishes the sensory organs are uncovered (without a… …   Dictionary of ichthyology

  • lateral line — a tube like sensory organ (usually bearing pores) extending along the side of the body from the rear of the head to the tail. Detects water movements, low frequency vibrations (lower than 160 200 Hz) and perhaps temperature changes. In some… …   Dictionary of ichthyology

  • mandibular canal — the portion of the preoperculo mandibular canal (of the cephalic sensory canals) running along the lower jaw …   Dictionary of ichthyology

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