File:Diagram of cleavage forms.jpg

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DIAGRAM OF CLEAVAGE:FORMS.

A. Radial type (Antedon ; modified from Seeliger).

B. Spiral type (Discocoelis ; after Lang).

C. Bilateral type (Clavelina ; after Van Beneden and Julin. The upper figure is considerably modified, the inequality between the macromeres and micromeres being exaggerated). The upper figures represent 8-celled stages seen from the upper pole. The lower figures are the corresponding 16-celled stages in the same position. In the case of unequal division the arrow points towards the smaller cell.
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Source https://archive.org/details/journalofmorphol08wist/page/599/mode/1up?view=theater Journal of morphology. Boston : Ginn & Co.
Author Wistar Institute of Anatomy and Biology

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current20:42, 22 March 2024Thumbnail for version as of 20:42, 22 March 20241,270 × 871 (957 KB)Rasbak (talk | contribs){{information |description=DIAGRAM OF CLEAVAGE:FORMS. A. Radial type (Aztedon ; modified from Seeliger). B. Spiral type (Discocoelis ; after Lang). C. Bilateral type (Clavelina ; after Van Beneden and Julin. The upper figure is considerably modified, the inequality between the macromeres and micromeres being exaggerated). The upper figures represent 8-celled stages seen from the upper pole. The lower figures are the corresponding 16-celled stages in the same position. In the case of unequa...