Fig. 4. Four major classes of stationary patterns in the model. The patterns are characterized by the presence of zero (A), one narrow (B), two (C) and one broad (D) peaks in the distribution of Rhomboid (and Spitz, not shown). In the text, we use these patterns to account for several of the eggshell morphology phenotypes schematically shown in the insets. The phenotypes corresponding to patterns A-D are denoted 0, 1, 2 and 1', respectively. The patterns A-D were computed for g₀=0.4, 0.6, 1.0 and 1.3, respectively, with all other parameters as in Fig. 3.