Defects in the viscerocranium of Class I smoc2 morphants. A: Lateral view of 5dpf zebrafish larva injected with 10 ng smoc2 UTR Morpholino; inset more severe smoc2 morphant with greatly reduced head. B: Lateral view of 5dpf zebrafish larva injected with 10 ng smoc2 SPL Morpholino. C: Ventral view of the craniofacial skeleton of an uninjected larva at 5dpf. D: Ventral view of the cranial skeleton of a smoc2 UTR morphant at 5dpf; inset: a lateral view of a severe smoc2 UTR morphant showing lack of discrete craniofacial cartilages. E: Ventral view of the cranial skeleton of a smoc2 SPL morphant. Asterisk denotes flattened or inverted ceratohyal and arrowhead indicates the presence of pharyngeal teeth in some smoc2 morphants. Abbreviations as in Figure 1.
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