Descrição da anatomia oral interna e condrocraniana das larvas de Pleurodema diplolister (Peters, 1870) (Anura: Leiuperinae)

Abstract

Anuran amphibians have great reproductive diversity and most of them have a larval stage, commonly known as tadpole. Besides the external morphology of these larvae, the larval anatomical traits present valuable information for the knowledge of the species, and because Pleurodema diplolister already has the external morphology of its larvae described, we complement the information about the species through the description of the internal oral anatomy and chondrocranium. The larvae of P. diplolister were collected during the rainy season (january to may) of 2021, in temporary pools near the community Serra dos Matões. Five tadpoles at stage 36 were prepared and analyzed for internal oral anatomy and five other tadpoles at stage 36 for the chondrocranium. The specimens were deposited in the biological collection of the Instituto Federal do Piauí, Campus Pedro II. Through the results, we noticed that P. diplolister kept the two pairs of infralabial papillae, quite conservative within the genus. Two pairs of lingual papillae on the buccal floor and the presence of a transverse ridge in the Prenarial arena. For the chondrocranium we noted the processus quadratoetmoidalis connected to the processus lateralis trabeculae, absence of the processus pseudopterygoideus and the processus oticus larvalis. Based on the results obtained it was possible to observe that the internal oral characters were more susceptible to change and the chondrocranium showed modification and absence of structures.