The remarkable larval morphology of Rhaebo nasicus (Werner, 1903) (Amphibia: Anura: Bufonidae) with the erection of a new bufonid genus and insights into the evolution of suctorial tadpoles.

IF 1.7 3区生物学 Q2 ZOOLOGY Zoological Letters Pub Date : 2024-09-30 DOI:10.1186/s40851-024-00241-0

Pedro Henrique Dos Santos Dias, Jackson R Phillips, Martín O Pereyra, D Bruce Means, Alexander Haas, Philippe J R Kok

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Abstract

Tadpoles serve as crucial evidence for testing systematic and taxonomic hypotheses. Suctorial tadpoles collected in Guyana were initially assigned to Rhaebo nasicus through molecular phylogeny. Subsequent analysis of larval and adult morphological traits revealed synapomorphies within the clade encompassing R. nasicus and R. ceratophrys, prompting the recognition of a new genus described herein as Adhaerobufo. The new genus is distinguished from other bufonids by specific phenotypic traits including an enlarged, suctorial oral disc with distinct papillae arrangements, and the presence of certain muscles and narial vacuities at the larval stage. However, only a few adult external characteristics (e.g., enlarged eyelids, infraocular cream spot), seem to be reliably discriminative from related genera. This study underscores the significance of larval morphology in anuran systematics and offers new insights into the evolution of suctorial and gastromyzophorous larvae within bufonids.

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Rhaebo nasicus (Werner, 1903) (Amphibia: Anura: Bufonidae) 的非凡幼虫形态，建立了一个新的 Bufonid 属，并揭示了蛙类蝌蚪的进化过程。

蝌蚪是检验系统学和分类学假设的重要证据。通过分子系统发育，在圭亚那采集的鞘翅目蝌蚪最初被归入Rhaebo nasicus。随后对幼体和成体形态特征的分析表明，在包括 R. nasicus 和 R. ceratophrys 的支系中存在同形异构现象，这促使人们认识到一个新的属，即本文描述的 Adhaerobufo 属。这一新属与其他布福类的区别在于其特殊的表型特征，包括扩大的扇形口盘和独特的乳突排列，以及幼虫阶段存在某些肌肉和腹膜空泡。然而，只有少数成虫的外部特征（如增大的眼睑、眼下奶油斑）似乎能可靠地与相关属区分开来。这项研究强调了幼虫形态学在无尾目动物系统学中的重要意义，并为了解布氏无尾目动物中套肠幼虫和胃口幼虫的进化提供了新的视角。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Zoological Letters Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： Zoological Letters is an open access journal that publishes new and important findings in the zoological sciences. As a sister journal to Zoological Science, Zoological Letters covers a wide range of basic fields of zoology, from taxonomy to bioinformatics. We also welcome submissions of paleontology reports as part of our effort to contribute to the development of new perspectives in evolutionary zoology. Our goal is to serve as a global publishing forum for fundamental researchers in all fields of zoology.