File:How the Turtle Gets its Shell.svg

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Captions

Captions

How the Turtle Gets its Shell: the ribs grow sideways not downwards, into the carapace bud.

Summary

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Description
English: At stage 16/17, a turtle embryo in the egg is developing its shell. In cross-section, the ribs are seen to be growing sideways into the carapace bud, unique to the group, rather than downwards, so as to support the shell.
Date
Source Own work. Redrawn from micrograph in Cebra-Thomas, Judith, et al (2005). "How the turtle forms its shell: a paracrine hypothesis of carapace formation". Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 304B (6): 558–569. DOI:10.1002/jez.b.21059. ISSN 1552-5007.
Author Ian Alexander
Other versions العربيَّة

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Date/TimeThumbnailDimensionsUserComment
current11:31, 28 May 2021Thumbnail for version as of 11:31, 28 May 20212,122 × 1,568 (54 KB)Chiswick Chap (talk | contribs)label
10:51, 28 May 2021Thumbnail for version as of 10:51, 28 May 20212,122 × 1,568 (54 KB)Chiswick Chap (talk | contribs)Uploaded own work with UploadWizard

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