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16 dpf Development

[ Back to The hyosymplectic: associated bones and articulations]
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16 dpf
zc81Tg
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Lateral
Description

By 384hpf, the hyosymplectic has grown considerably compared to its size at 288hpf. In addition, the angle between the dorsal and ventral portions of the hyosymplectic (hs), with the articulation of the interhyal (ih) as the fulcrum of this angle, appears to have increased compared to that seen at 288hpf. The hyomandibula (hm) has almost completely covered the dorsal portion of the hyosymplectic, with prominent dermal extensions from the perichondrium. The symplectic (sy) has encompassed almost all of the ventral portion of the hyosymplectic, so the only portion of the body of the hyosymplectic that remains unossified is that adjacent to the interhyal, which even persists in the adult (data not shown).