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Results for “opercle”

Ichthyological terms, not general ones.

Species 31Articles 3Glossary 13

  • opercle

    Bone forming the upper, posterior portion of the operculum, sometimes bearing spines or spine-like structures. Normally the largest of the bones comprising the operculum.

    Used in 149 profiles

  • preopercle

    Bone forming the posterior and lower margins of the cheek; the anteriormost bone of the opercle. Also known as the preoperculum.

    Used in 62 profiles

  • subopercle

    One of the bones comprising the operculum, situated below the opercle.

    Used in 2 profiles

  • interopercle

    One of the bones comprising the operculum.

    Used in 1 profile

  • branchiostegal membrane

    The membrane, sometimes referred to as the gill membrane, connecting the branchiostegal rays and enclosing the ventral portion of the branchial cavity. Normally extended when the opercle of a fish is open, sealing the branchial cavity and creating a vacuum in the mouth, and also used during threat, courtship and other communicative behaviours in many species.

    Used in 5 profiles

  • humeral spot

    A marking on the body in the area analogous to the humerus, or shoulder. In fishes it's normally located above the pectoral-fin and behind the opercle. There may be more than a single such spot in some species.

    Used in 42 profiles

  • pectoral-fin

    Anterior, paired fin attached to the pectoral girdle of fishes, usually just behind the opercle and corresponding to the forelimbs of higher vertebrates. Assists in controlling direction of movement and swimming speed. Frequently abbreviated to 'P' or 'P1' in scientific papers.

    Used in 508 profiles

  • pseudotympanum

    Translucent, triangular area in the humeral region, behind the opercle, without muscle and where the anterior part of the gas bladder is in direct contact with the skin. It is hypothesised to function as a hearing aid in many juvenile characoids and is present in adults of certain species, notably members of the family Cheirodontidae.

    Used in 2 profiles

  • interopercular

    Of, relating to, or located on the interopercle.

    Used in 16 profiles

  • preopercular

    Relating to, of, or located on the preopercle.

    Used in 40 profiles

  • subopercular

    Of, relating to, located on, or being the subopercle.

    Used in 15 profiles