シヨウジヨウバエの比較形態學的研究III "phallosomal index"より見た類縁関係

概要

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The "phallosomal index" (P. I.) which is the ratio between the length of the aedeagus and that of its basal apodeme of the male phallic organs was measured for each of 64 Japanese and 12 exotic species of the drosophilid flies belonging to the 12 genera. The P. I. of a certain species tends to decrease slowly in value after the emergence of the adult flies, to settle to an ultimate level, characteristic to the respective species. The primitive species seem to show relatively small ultimate values of P. I. while, the more advanced forms take the lerger values. This serial change of P. I. (from more primitive to more advanced species) finds parallels among different larger systematic groups such as subfamilies, subgenera, or sections.
社団法人日本動物学会の論文
1953-08-15