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File:Antedon rosacea early stages.jpg

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Description Blastula.Fig, 403.—Early stages in the embryonic development of Antedon rosacea, (After Seeliger.) A, sagittal section through an embryo twenty-six hours old in the gastrula stage. B, longitudinal frontal section through an embryo forty-eight hours old, to show the division of the archenteron into two coelomic vesicles. C, longitudinal frontal section through an embryo fifty-seven hours old, to show the belated formation of the alimentary canal. D, longitudinal sagittal section through an embryo seventy-five hours old, to show the complete division of the coelom and the formation of the bydrocoele. a.c, anterior coelom ; a.coe, anterior primary division of the coelom ; a.l, rudiment of alimentary canal ; arch, archenteron ; hy, hydrocoele ; l.p.c, left posterior coelom ; mes, mesenchyme; p.coe, posterior primary division of the coelom ; r.p.c, right posterior coelom. Antedon bifida synonym: Antedon rosacea
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Source https://archive.org/details/cu31924024787040/page/546/mode/1up?view=theater https://www.flickr.com/photos/internetarchivebookimages/20781244561 Text-book of embryology
Author MacBride, E. W. (Ernest William), 1866-1940; Kerr, John Graham, 1869-; Heape, Walter, 1855-1929

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current22:20, 30 January 2024Thumbnail for version as of 22:20, 30 January 2024801 × 735 (425 KB)Rasbak (talk | contribs){{Information |description=Blastula.Fig, 403.—Early stages in the embryonic development of Antedon rosacea, (After Seeliger.) A, sagittal section through an embryo twenty-six hours old in the gastrula stage. B, longitudinal frontal section through an embryo forty-eight hours old, to show the division of the archenteron into two coelomic vesicles. C, longitudinal frontal section through an embryo fifty-seven hours old, to show the belated formation of the alimentary canal. D, longitudinal sagi...

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