The branchial basket of lampreys (7 gill arches) evolved into
Jaws, hyoid, and 5 gill arches
The branchial basket of lampreys, which consists of 7 gill arches, evolved into the more complex branchial arches seen in jawed vertebrates. These branchial arches, also referred to as pharyngeal arches, contain important structures for respiration and feeding, such as the gills, jaws, and supporting structures.
Through evolutionary processes, the branchial arches of jawless lampreys underwent modifications, resulting in the evolution of the more complex branchial arches found in jawed vertebrates. These modifications included the development of skeletal elements within the arches, such as the jaws, as well as changes in the arrangement and function of the arches.
Overall, the evolutionary development of branchial arches was an important step in the development of vertebrates and allowed for the diversification of feeding strategies and environments.
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