File:Abatus cordatus Post-gastrular stage 100 days after fertilization.jpg

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Description Figure 9. Post-gastrular stage of Abatus cordatus (100 days after fertilization). (A) Reconstruction of the embryo passing through an ambulacral and an interambulacral section of the oral face. (B) Section through a primary podium and the ambulacral canal. (C) Oral surface of the future juvenile viewed by SEM when the ectoderm is discarded. (D) Section through the stomodeum area of the postgastrula embryo. (E) Section through the vestibule showing podia and spine buds. Radial nerves are already visible. B, D and E are semi-thin plastic sections (toluidine blue, pH 11.5). Abbreviations: ac, aquiferous canal; amp, primordial podia; ap, animal pole; ar, aquiferous ring; az, ambulacral zone; cc, coelomic cavity; ce, coelomic epithelium; de, endoderm that will give the digestive epithelium; dl, digestive lumen; ect, ectoderm; efs, ectodermic fold of the stomodeum; eme, embryonic epithelium; mes, mesenchyme; n, nerve; np, neural plate; pb, podia bud; sb, spine bud; V, vestibule; vp, vegetal pole. Scale bar = A, 500 μm; B and C, 50 μm; D and E, 100 μm.
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Source https://archive.org/details/biologicalbullet1901996lill/page/36/mode/1up?view=theater The Biological bulletin. Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press.
Author Lillie, Frank Rattray, Moore, Carl Richard, Redfield, Alfred Clarence.

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current22:06, 25 March 2024Thumbnail for version as of 22:06, 25 March 20241,025 × 1,566 (1.41 MB)Rasbak (talk | contribs){{information |description=Figure 9. Post-gastrular stage of Abatus cordatus (100 days after fertilization). (A) Reconstruction of the embryo passing through an ambulacral and an interambulacral section of the oral face. (B) Section through a primary podium and the ambulacral canal. (C) Oral surface of the future juvenile viewed by SEM when the ectoderm is discarded. (D) Section through the stomodeum area of the postgastrula embryo. (E) Section through the vestibule showing podia and spine bu...

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