Information Obtained from the Prezoeal Cuticle of the Brachyura

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  • 短尾類のプリゾエアに存在する胚外被から得られる情報
  • タンビルイ ノ プリゾエア ニ ソンザイスル ハイガイヒ カラ エラレル ジョ

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Description

Detailed descriptions of the prezoeal cuticle are given for three brachyuran crabs : Cycloxanthops truncatus (DE HAAN), Hexapinus latipes (DE HAAN), Macromaedeus distinguendus (DE HAAN). The form of the prezoeal cuticle represents naupliar features rather than protozoeal ones. Compared with the family Penaeidae, the Brachyura diverged from the early ontogenetic stage, and attained a significantly higher evolutionary level. Therefore, the Brachyura seem to have developed by neotenic evolution.

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