日本産普通多足類の後胚発生XXIII. : キンシャトリデヤスデの生活史についての二, 三の知見

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Phrurodesmus kinshaensis is a leptodesmid millipede with endemic distribution in part of Shikoku. The present description of its breeding habits is based on the observation of Oshima populations. A copulation usually covers the period from the end of April to the middle of May. Copulating pairs are often found under rotten leaves in the natural habitat, and the actual position of the pairs are of volute-like shape. Eggs, being grouped in 346 to 127 clutches, are deposiited into small rough cavities below the surface of the soil. In natural habitats and also under breeding conditions, there no such special brooding chambers were found as is known in other groups of polydesmoidea. The eggs are creamy white, spherical and anout 0.5mm in diameter. The incubation period of the eggs under laboratory conditions apporoximately five weeks.The first larvae usually occur in June. Postembryonic development of Phrurodesmus is characterized by seven moults, with the addition of segments and pairs of legs. The eight anamorphic stadia are summarized in the table. Through all the laval stadia, the moults take place in moulting chambers built in the soil by larvae, and those chambers are usually found under stones or dumped tiles, etc.
社団法人日本動物学会の論文
1966-10-15