(Kopinke, Sasine et al. 2006) The dermatocranium forms the external surface of the skull and surrounds the neurocranium and the two first pairs of pharyngeal arches. Table 1. Zebrafish viscerocranium and neurocranium composition at 6 dpf (Nüsslein-Volhard and Dahm 2001). Region Cartilage elements Viscerocranium or pharyngeal arches Pharyngeal arch 1 or Meckel’s cartilage mandible Palatoquadrate Pharyngeal arch 2 or Hyosymplectic Interhyal Ceratohyal Basihyal Pharyngeal arch 3 or Ceratobranchial 1 branchial arch 1 Hypobranchial 1 Basibranchial 1 Pharyngeal arch 4 or Ceratobranchial 2 branchial arch 2 Hypobranchial 2 Basibranchial2 Pharyngeal arch 5 or Ceratobranchial 3 branchial arch 3 Hypobranchial 3 Basibranchial 3 Pharyngeal arch 6 or Ceratobranchial 4 branchial arch 4 Hypobranchial 4 Basibranchial 4 Pharyngeal arch 7 or Ceratobranchial 5 branchial arch 5 Basibranchial 5 Neurocranium Anterior Ethmoid plate Trabeculae cranii Anterior basicranial commissure Orbital cartilage Posterior Posterior basicranial commissure Basal plate Parachordal cartilage Otic capsule Occipital arch
(Kopinke, Sasine et al. 2006) The dermatocranium forms the external surface of the skull and surrounds the neurocranium and the two first pairs of pharyngeal arches. Table 1. Zebrafish viscerocranium and neurocranium composition at 6 dpf (Nüsslein-Volhard and Dahm 2001). Region Cartilage elements Viscerocranium or pharyngeal arches Pharyngeal arch 1 or mandible Meckel’s cartilage Palatoquadrate Pharyngeal arch 2 or Hyosymplectic Interhyal Ceratohyal Basihyal Pharyngeal arch 3 or branchial arch 1 Ceratobranchial 1 Hypobranchial 1 Basibranchial 1 Pharyngeal arch 4 or branchial arch 2 Ceratobranchial 2 Hypobranchial 2 Basibranchial2 Pharyngeal arch 5 or branchial arch 3 Ceratobranchial 3 Hypobranchial 3 Basibranchial 3 Pharyngeal arch 6 or branchial arch 4 Ceratobranchial 4 Hypobranchial 4 Basibranchial 4 Pharyngeal arch 7 or branchial arch 5 Ceratobranchial 5 Basibranchial 5 Neurocranium Anterior Ethmoid plate Trabeculae cranii Anterior basicranial commissure Orbital cartilage Posterior Posterior basicranial commissure Basal plate Parachordal cartilage Otic capsule Occipital arch
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