Figure 5 in Anatomy, histology, and systematic implications of the head ornamentation in the males of four species of Limnonectes (Anura: Dicroglossidae)

Figure 5. Details of the histological structure of the caruncle. A, dorsal portion of the caruncle parasagitally sectioned and showing the typically layered skin, with underlying connective tissue (ct). Abbreviations: ct, connective tissue; lc, lamina calcarea; sc, stratum corneum; sco, stratum compactum; sg, stratum germinativum; ss, stratum spongiosum. B, transverse section through the lateral margin showing the overall homogeneity of the caruncle. C, D, irregular osseous projections (op) of the parietal bone at the anterior margin of the caruncle. E, detail of dense connective tissue. F, cleavage within the connective tissue of a flap-like caruncle. G, detail of the connective tissue showing capillaries (arrowheads) of various dimensions and fat cells (fc). Limnonectes macrognathus is shown in (A), (D), and (E); L. gyldenstolpei is shown in (B), (F), and (G); L. dabanus is shown in (C). Scale bars: A, D, E, G, 100 μm; C, 200 μm; B, F, 500 μm.