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Abdominal skin of the adult newt. (a,b) Representative images of transverse sections of the border of black and orange areas. Ep: epidermis; GG: granular gland; M: muscle; MG: mucous gland; Mp: melanophore; PLC: pigment cell layer; Xp: xanthophore. Arrow heads: pigmented fiber layers. Scale bars: 100 μm.
