Figure 4 in Anatomy, histology, and systematic implications of the head ornamentation in the males of four species of Limnonectes (Anura: Dicroglossidae)

Figure 4. Comparative overview of the histological structure of the caruncles in the four species of Limnonectes: A, Limnonectes dabanus; B, Limnonectes gyldenstolpei; C, Limnonectes macrognathus; D, Limnonectes plicatellus. Note that in spite of the fundamentally differing external morphology, the histology is virtually identical: a size-variable pad of connective tissue (ct) lies between the skin (sk) and the parietal bone (pb). Scale bars: 2 mm.