三爪類数種のクモの内部形態について

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  • Comparative anatomy of some internal organs in spiders of Trionycha
  • サンソウルイ スウシュ ノ クモ ノ ナイブ ケイタイ ニ ツイテ

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1. A comparative anatomy of some internal organs in nine spicies of Trionycha is reported on the basis of female adult specimens collected in Tottori Prefecture. 2. The ratio of the length of book-lung to body length is nearly constant throughout the nine species. 3. The tracheal system was observed to differ in structure from one another in seven of the species studied. 4. With respect to the seven species in which the diverticula of thoracenteron were studied, the lateral diverticula are disposed in accordance with the legs. 5. There are three spermathecae in Tetragnatha praedonia L. KOCH, while two exist in the other eight species. 6. The pyriform glands are sausage-shaped in Uroctea compactilis L. KOCH, but they are typically pyriform to elliptical in the other eight species. 7. The aciniform glands were recognized to be absent in Meta yunohamensis BÖS. et STR., Leucauge magnifica YAGINUMA and Tetragnatha praedonia L. KOCH. These glands of Agelena limbata THORELL are modified-cucumber-shaped, whilst those of the remaining four species are typically like a cluster of grapes. 8. The tubular glands considerably differ in shape from one another in six of the species studied.

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