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Stages are assigned based on morphology (Duellman & Trueb, 1986). Stages are as follows: Stage 21 (A). Stage 25–26 (B). Stage 31 (C). Stage 34 (D). Stage 37–38 (E). Stage 40 (F & G). Pigment accumulation (black arrow) around the developing eye in stage 40 is noted (G).
