Figure 5. The First 32 Members of the Shortened Axis Phenotypic Class.

This class can be subdivided into six synphenotype groups, as indicated in Figure 3 and Table 4. Members of the first three synphenotype groups (involution defects, gastrula or neurula defects, and short axis surviving to tailbud) are shown at tailbud stage (stage 24–28), while the member of the second synphenotype group shown here (short axis surviving to tadpole) is shown at tadpole stage 35–41. Lines in this and subsequent figures demarcate the different synexpression groups.