ショウジョウバエの比較形態学的研究 : IX.分類体系より見た射精嚢内甲の分化

概要

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An assumption was made on the trends of intergeneric differentiation of the ejaculatory apodeme of Drosophilidae and allied families, Cryptochaetidae, Aulacigastridae and Diastatidae, on the basis of our current knowledge of their systematic relationships. The assumed trends include five distinct processes of differentiation, i.e. I. posterior or centripetal shifting of the junction of the stalk of apodeme on the basal plate; II. decrease of angle between the stalk andthe basal plate; III. vertical swelling of the stalk; IV. increase of the widthof basal plate; and V. decrease of the relative length of stalk and basal plate. These processes appear to have occurred in the lineage in an order, II-IV-V-III-I, which almost corresponds to the descending order of frequency (number of genera) of occurrence of each process.
社団法人日本動物学会の論文
1961-08-15