ショウジョウバエの比較形態学的研究VI. : 直腸突起の数, 排列及び形状

概要

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The rectal papillae of 84 species of the drosophilid flies, belonging to 15 genera, were examined. Cryptochaetum grandicorne Rondani was found to have 6 papillae, a unique number hitherto known not only in the Drosophilidae but even in the suborder Cyclorrhapha. The remaining 83 species showed usual 4 papillae. The arrangement of papillae in the rectal pouch is in two rows, opposite to each other, except in the Cryptochaetum, in which the papillae are arranged in a rosette. The more primitive systematic group tends to show the smaller "rectal index (R)", which is a ratio between the length and the greatest width of a papilla. It will roughly be said that, between larger systematic groups of Drosophilidae, "R" is directly proportional with the "coiling degree of proximal intestine (C)."
社団法人日本動物学会の論文
1954-07-15