Fig. 11. Ontogenetic size progression from D4 in Morphology and developmental traits of the trilobite Changaspis elongata from the Cambrian Series 2 of Guizhou, South China

Fig. 11. Ontogenetic size progression from D4 to D16 of Changaspis elongata Lee in Chien, 1961. A. Least square linear regression of ln CELd on the d stage (rA = 0.96622, n = 13). B. Least square linear regression of ln TRLd on the d stage (rB = 0.98373, n = 13). Bars are mean standard errors caused by structural deformation and measurement. Abbreviation: CELd, cephalic length on the d stage; TRLd, trunk length on the d stage.