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in osteichthyans, have the form of one or more rod-like bones projecting backwards along the midline of the throat.
* The Ceratohyals and Ceratobranchials lie above their respective basi- components, slanting backwards and upwards. They are often the largest bony components of the gill system, as well as the most essential and abundant components. Small connecting bones known as Hypophyals or Hypobranchials may link the basi- and cerato- components, and hypobranchials in particular

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