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4 dpf Development

[ Back to The palatoquadrate: associated bones and articulations]
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4 dpf
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By 104 hpf, the palatoquadrate (pq) has grown considerably from that seen at 72 hpf. The palatoquadrate now can be discerned completely from Meckel’s cartilage (Mk) at its anterior articulation and articulates with the hyosymplectic (hs) posteriorly. The pterygoid process (ptp) of the palatoquadrate articulates with the ethmoid (e) of the neurocranium. Also visible is the entopterygoid (en), which initiates in the dermis alongside the medial aspect of the pterygoid process.