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

Click here to view publicly accessible slides and webcasts from the FaceBase Phase 2 Final Recap webinar.

FishFace

21 dpf Development

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

Please hold mouse over images to see annotations.

21 dpf
zc81Tg
Alizarin red
Ventral
Lateral
Description

By 516 hpf, the ceratohyal (ch) has grown in size considerably from that seen at 342 hpf, although the medio-lateral thickness at the middle region remains one cell layer. Articulations of the ceratohyal with the interhyal (ih), the contralateral ceratohyal, and branchiostegal rays 1, 2, and 3 (bsr1, bsr2, bsr3) are visible. The four bones of the ceratohyal perichondrium now almost cover the cartilage completely: the ventral hypohyal (hhv) and dorsal hypohyal (not shown) along the anterior end, the ceratohyal bone (chb) along the middle region, and the epihyal (eh) at the posterior end. Also forming in some specimens is branchiostegal ray 4 (bsr4), which articulates with the medial aspect of the ceratohyal bone anterior to branchiostegal ray 1.