Figure 1
From: Early development of Ensatina eschscholtzii: an amphibian with a large, yolky egg
Rate of early development in Ensatina eschscholtzii. The stages of development are from Harrison (1969) and range from 1 (one cell) to 20 (neural folds fused). Figure legends consist of symbol, subspecies (clutch number) year. Key to subspecies of E eschscholztii: Eee, E. e. eschscholztii; Eec, E. e. croceator; Eek, E. e. klauberi; Eeo, E. e. oregonensis; Eep, E. e. picta; Eeeo, possible hybrid of E. e. eschscholztii X E. e. oregonensis; Eeox, possible hybrid of E. e. oregonensis X E. e. xanthoptica.