論文

査読有り
2014年5月

Development of the swimming acorn worm Glandiceps hacksi: similarity to holothuroids

EVOLUTION & DEVELOPMENT
  • Makoto Urata
  • ,
  • Sadaharu Iwasaki
  • ,
  • Susumu Ohtsuka
  • ,
  • Masaaki Yamaguchi

16
3
開始ページ
149
終了ページ
154
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1111/ede.12075
出版者・発行元
WILEY-BLACKWELL

Spawnings of Glandiceps hacksi (Hemichordata: Enteropneusta) were stimulated in the laboratory by a brief increase in temperature, and the development from fertilization through metamorphosis is described for the first time for a member of the family Spengelidae. When fertilized, the spawned female gametes, which are primary oocytes, rapidly raise a fertilization membrane and undergo two maturation divisions. Holoblastic, radial cleavage produces a blastula; a gastrula then forms by invagination from the vegetal pole, and the blastopore closes soon thereafter. In previously described enteropneust embryos, the archenteron buds off the protocoel before the latter connects to the exterior via the proboscis pore. By contrast, in G. hacksi the archenteron precociously connects with the exterior before the protocoel forms. Soon thereafter, the embryo becomes uniformly ciliated and then hatches from the fertilization envelope at approximately 32 h (15 degrees C culture temperature). At day 3 of development, the protocoel separates from the gut, which establishes a mouth opening to the exterior; by this time, the gut has differentiated into an esophagus, a stomach, and an intestine that opens posteriorly as an anus. The larva grows to form a tornaria with distinctive pigment patches along its ciliary bands.

Web of Science ® 被引用回数 : 5

リンク情報
DOI
https://doi.org/10.1111/ede.12075
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000337506800005&DestApp=WOS_CPL

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