Rheubert Justin L, Cook Hanna E, Siegel Dustin S, Trauth Stanley E
1 Department of Biology, University of Findlay, Findlay, OH 45840, USA.
2 Department of Biology, Southeast Missouri State, Cape Girardeau, MO 63701, USA.
Zoolog Sci. 2017 Oct;34(5):445-451. doi: 10.2108/zs170060.
Previous studies have revealed variations in the urogenital system morphology of amphibians. Recently, the urogenital system of salamanders was reviewed and terminology was synonymized across taxa. Discrepancies exist in the terminology describing the urogenital system of anurans, which prompted our group to develop a complete, detailed description of the urogenital system in an anuran species and provide nomenclature that is synonymous with those of other amphibian taxa. In Rana catesbeiana, sperm mature within spermatocysts of the seminiferous tubule epithelia and are transported to a series of intratesticular ducts that exit the testes and merge to form vasa efferentia. Vasa efferentia converge into single longitudinal ducts (Bidder's ducts) on the lateral aspects of the kidneys. Branches from the longitudinal ducts merge with genital kidney renal tubules through renal corpuscles. The nephrons travel caudally and empty into the Wöffian ducts. Similar to salamanders, the caudal portion of the kidneys (termed the pelvic kidneys in salamanders) only possesses nephrons involved in urine formation, not sperm transport. Data from the present study provide a detailed description and synonymous nomenclature that can be used to make future comparative analyses between taxa more efficient.
以往的研究揭示了两栖动物泌尿生殖系统形态的差异。最近，对蝾螈的泌尿生殖系统进行了综述，并统一了各分类群的术语。在描述无尾目动物泌尿生殖系统的术语方面存在差异，这促使我们团队对一种无尾目物种的泌尿生殖系统进行完整、详细的描述，并提供与其他两栖类分类群同义的命名法。在牛蛙中，精子在生精小管上皮的精囊中成熟，并被运输到一系列离开睾丸并合并形成输出小管的睾丸内管道。输出小管在肾脏外侧汇聚成单一的纵管（毕德氏管）。纵管的分支通过肾小体与生殖肾肾小管汇合。肾单位向尾侧延伸并排入吴氏管。与蝾螈相似，肾脏的尾部（蝾螈中称为骨盆肾）仅拥有参与尿液形成的肾单位，不参与精子运输。本研究的数据提供了详细的描述和同义命名法，可用于使未来不同分类群之间的比较分析更高效。
