Figure 4. Alcian blue staining of 3 dph embryonically exposed larvae.

(A,E) show a lateral and dorsal view of a control larva, respectively. (B–D) and (F–G) show the lateral and dorsal views of exposed larvae, respectively. t/ep = trabeculae crania/ ethmoid plate, pch = parachordal cartilages, m = Meckel’s cartilage, q = quadrate, hs = hyomandibular symplectic pharyngeal arches, hy = hyoid pharyngeal arches, cb = ceratobranchial Asterisk in (D) indicates absent basicranial cartilages Scale bar 0.5 mm.