著者

村上,好央

出版者

東京動物學會

雑誌

動物学雑誌

巻号頁・発行日

vol.65, no.2, 1956-02-15

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The author tried to breed a Japanese house centipede, Thereuonema hilgendorfi Verhoeff and examined its postembryonic development on the basis of the passed number of molting. 1. The eggs are creamy yellow, subspherical, and covered with microscopic hairs which are helpful to moisten rapidly the surface of eggs by a little water in the soil. Each egg has a diameter of 1mm and the length of 1.2mm, its shell being about 40μ tick. All eggs are not laid in masses. The embryos bear four pairs of legs, four tergits and two zonular tergits of maxillary segments and prehensors. Their eyes are pigmented compound. 2. The six larval stadia, as summarized in Table 1, can be distinguished by differences in pairs of legs. Larvae of each stadium bear the embryonic tergits, sternits and limb buds on the mesodermic somite. After the sixth molting, larvae come into Agenitalis-stadium. 3. The epimorphic developmental period is divided into six stadia and these have the relation to the passed number of molting as follows: No. of molting Body size Agenitalis I: 6 7.5-9.0mm. length Agenitalis II: 7 8.5-10.5mm. length Immaturus: 8 10.5-13mm. length Praematurus: 9 11.5-14.5mm. length Pseudomaturus: from 10 to 12 12-20mm. length Maturus: from 13 to 17 19-28mm. length 4. The Hemianamorphic development of T. hilgendorfi is divided into twelve stadia. Of those stadia, Pseudomaturus and Maturus pass through three and five times moltings respectively, while the others one molting.