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Fig. 2 | EvoDevo

Fig. 2

From: Shell field morphogenesis in the polyplacophoran mollusk Acanthochitona rubrolineata

Fig. 2

General development of A. rubrolineata. An egg hull (eh) can be recognized before the hatching of the trochophore larva a–g. In b, the zygote is dividing. Panel h shows an early trochophore. Larval eyes emerge at around 24 hpf (arrowheads in i), and are retained after metamorphosis (arrowheads in k–l). In j, the shell field (sf) showing serially arranged repeated units could be clearly recognized. Spicules (double arrows in k and l) start to develop during metamorphosis and seven shell plates could be observed in juveniles (numbers in l). pt, prototroch. Bars represent 50 μm

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