FIGURE 1 in Tadpole buccal secretory glands as new support for a Neotropical clade of frogs

FIGURE 1. Transverse sections at the buccal cavity level of a tadpole of L. furnarius stained with Periodic Acid Schiff. Above: the whole specimen showing the lumen of the buccal cavity and its epithelium (within the green circle); the red arrow points to the ventrodorsal plane. Below: Details of the two kinds of mucous glands of the buccal epithelium, the red arrows point to secretory ridges on the ventral surface of the ventral velum; the black arrows point to secretory pits at the posterior edge of the buccal roof.