兩棲類腎臟の構造及び精巣との聯關に關する研究 : 第3報有尾類其の2

概要

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In the kidney Triturus pyrrhogaster a rather primitive and "urodele" type of urinary canaliculus (Type 1-transversal) was found in the anterior part, and a more differentiated "anuran" type (Type 1-dorso-ventral) in the posterior. From the results of the present and two former investigations (Yoshioka, '49, '51), the author concludes that there exist five more types of canaliculi in amphibian kidneys in addition to the two which have been described by other authors (Beissner, 1898). The discovery of these new types makes clear sperm paths in kidneys and the relation of the latter to testes. According to grades of differentiation, all the seven types could be ranked phylogenetically, and their distribution in each urodele kidney seems to clarify its position in genealogy as is shown in the table. The type 3-connective just coincides with the type which was presupposed by the author ('49) as a transitional stage toward an isolated type.
社団法人日本動物学会の論文
1951-09-15