Fig. 11From: Microanatomy of the female reproductive system of the viviparous freshwater whipray Fluvitrygon signifer (Chondrichthyes: Myliobatiformes: Dasyatidae). II. The genital ductHistochemical characteristics of the vaginal epithelium of F2, F3 and F4 females of Fluvitrygon signifer. The vaginal epithelium of F2 (a, b), F3 (c, d) and F4 (e, f) females showing differential histochemical profiles. Photomicrographs are designated with their corresponding specimen codes. Abbreviations: DC: desquamated cell; Gr, granule. Stains: a, c, e = PAS–H; b, d, f = modified Movat’s pentachromeBack to article page