For full functionality of this site it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.

The third phase of FaceBase has kicked off this fall and our first update is:
We are accepting data from the community!

FishFace

3 dpf Development

[ Back to The hyosymplectic: associated bones and articulations]
Info Image

Please hold mouse over images to see annotations.

3 dpf
zc81Tg
Alizarin red
Lateral
Description

By 72 hpf, the hyosymplectic (hs) has increased in size and cell number from that seen at 48 hpf. The hyomandibula region of the dorsal hyosymplectic is still difficult to distinguish from the anterior portion of the otic capsule (ot) dorsally, but the symplectic region of the ventral hyosymplectic can be discerned easily from the ceratohyal (ch) ventrally. The interhyal (ih), which articulates where the two hyosymplectic regions meet, is still not easy to distinguish. The symplectic region overlaps considerably with the palatoquadrate (pq) anteriorly. Note the facial nerve (VII) foramen (ff) in the hyomandibula region. Alcian blue staining of matrix is observed in these developing cartilages at this stage (data not shown). The opercle (op) projects ventrally from the posterodorsal aspect of the hyomandibula region in a ball-and-socket joint.