Fig. 4 in Morphological and molecular characterisation of two closely related species: Myxobolus tihanyensis n. sp. and Myxobolus sandrae Reuss, 1906

Fig. 4. Histology sections of Perca fluviatilis using the haematoxylin and eosin (H & E) technique. (A–B) Sagittal section of the proximal region of the caudal fin. (A) Rounded plasmodia (p) developing in the mesenchyme (mh) closely attached to the bases of the rays (r), scale bar = 100 μm. (B) Higher magnification of plasmodiacontaining spores. Scale bar = 20 μm. (C–D) Transversal section of the caudal vertebrate region. (C) Plasmodia located between the hemal spine (hs) and muscular fibres (mf), scale bar = 200 μm. (D) Higher magnification of plasmodia containing spores (black arrows), scale bar = 20 μm.