Setor de Herpetologia, Museu de História Natural, Universidade Federal de Alagoas, Maceió, Alagoas, Brazil.
Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
J Morphol. 2022 Oct;283(10):1299-1317. doi: 10.1002/jmor.21503. Epub 2022 Aug 25.
The highly differentiated anuran larvae make them an interesting and complementary source of information to understand anuran evolution. Among neotropical foam-nesting frogs, the available information on tadpole morphology for the subfamily Leiuperinae remains largely incomplete and variably reported among genera; in the monophyletic genus Engystomops it is still incipient. Herein, we summarize available information on larval morphology for five of the nine known species of Engystomops, three of them for the first time, reporting external morphology, buccopharyngeal cavity, and skeleton. The tadpoles of the genus have an overall generalized morphology and many traits are conserved across species. Nevertheless, many characters are systematically informative and some are diagnostic for some species, as the paravertebral gland in Engystomops petersi and the dorsally directed spiracle in Engystomops puyango. Other characters provide support for some subclades within the genus. Moreover, some traits, such as the direction of the vent tube, supports the close relationship between Engystomops and Physalaemus, whereas other support the existence of these two as distinct genera, such as the overall shape of the lateral ridge papillae and the presence of a processus pseudopterygoideus.
高度分化的无尾两栖类幼虫是了解无尾两栖类进化的有趣而互补的信息来源。在新热带泡沫巢蛙中，有关 Leiuperinae 亚科的蝌蚪形态的可用信息在很大程度上仍然不完整，并且在属之间有不同的报道；在单系的 Engystomops 属中，它仍然是初步的。本文总结了已知的 9 种 Engystomops 物种中的 5 种的幼虫形态的可用信息，其中有 3 种是首次报道，报告了外部形态、口咽腔和骨骼。该属的蝌蚪具有整体的一般化形态，许多特征在物种间是保守的。然而，许多特征在系统上是有信息的，有些特征对某些物种是具有诊断意义的，如 Engystomops petersi 中的椎旁腺和 Engystomops puyango 中的背向气门。其他特征为该属内的一些亚类提供了支持。此外，一些特征，如通气管的方向，支持 Engystomops 和 Physalaemus 之间的密切关系，而其他特征则支持这两个属是不同的，如侧嵴乳突的整体形状和假翼突的存在。
