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Somitogenesis in A. australis embryos. Stages of somitogenesis: a) 6-7 somites, ~24 hpf; b) 11 somites, ~26 hpf; c) 17 somites, ~30 hpf. (Scale bar = 0.5 mm; kv = Kuppfer's vesicle; sm = somites) Note: due to the limited depth of field of the microscope in relation to the size of the embryos, not all structures can be shown simultaneously.
