A Length versus height of left valves and microscope photographs of L. inopinata from A-8 stage to adult B Plot demonstrating the growth ratio elements KL and KH of L. inopinata from A-8 stage to adult. KL = Lm+1 / Lm, KH = Hm+1 / Hm, where KL and KH are growth ratios of mean length and height, Lm and Hm are respectively mean length and height at stage m, and Lm+1 and Hm+1 are respectively mean length and height at stage m+1. The black line suggests a growth ratio of 1.26, the value predicted by Brooks’ rule. All individuals are from the indoor bioculture laboratory.