The genus Corythomantis currently comprises a single species, Corythomantis greeningi, a hylid widely distributed in xerophilic and subhumid morphoclimatic regions of Brazil, mainly in the Northeast region. Recently the external morphology, internal oral anatomy, and chondrocranium of C. greeningi tadpoles were described from specimens collected in the state of Bahia, however, we observed some differences in morphology of individuals from the state of Piaui, northeastern Brazil. The tadpoles were collected during the 2019 rainy season and 14 individuals were used to describe and compare the larval characters. We observed differences in external, internal oral and chondrocranial morphology in relation to specimens previously described, especially in oral disc, number and shape of oral cavity papillae, and some chondrocranium structures, as: cartilago suprarostralis, cornua trabeculae, fontanella frontoparietalis, cartilago orbitalis e planum hypobranchiale. Our results point to the occurrence of heterochrony in C. greeningi, but we do not rule out the possibility that tadpoles belong to different species. Further studies involving a greater number of tadpoles at different stages, combined with genetic, acoustic, and morphological factors of adult specimens may establish the variation degree of C. greeningi in different regions of northeastern Brazil.

中文翻译：

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1896年，绿僵菌（Corythomantis greeningi Boulenger）the的外部，内部口腔和软骨形态的差异（阿努拉：Hylidae）

Corythomantis属目前包括一个单一种，即Corythomantis greeningi，一种在广泛分布于巴西的亲旱和半湿润的形态气候区域（主要分布在东北地区）的菌丝。最近，从巴伊亚州收集的标本中描述了C. greeningi t的外部形态，内部口腔解剖和软骨颅，但是，我们观察到巴西东北部Piaui州个体的形态有些差异。在2019年雨季期间收集了collected，并用14个人描述和比较了幼虫的性状。我们观察到与先前描述的标本有关的外部，内部口腔和软骨结构形态差异，特别是在口腔盘，口腔乳头的数量和形状以及某些软骨颅骨结构方面，如下：腕上软骨，角膜小梁，额结font，软骨下plan。我们的结果指出了在C. greeningi中发生异时性，但是我们不排除t属于不同物种的可能性。进一步的研究涉及不同阶段的大量genetic，并结合成年标本的遗传，声学和形态学因素，可能会确定巴西东北部不同地区的绿化梭菌的变化程度。