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The textbook I referenced has some of the information that I added but not all. The information is, for the most part, verifiable through Google searches, looking at the context in primary literature and in the lecture slides posted online by various teachers. If anyone has any better textbook or review article references to cite, please do so. IlliniWikipedian 18:01, 1 December 2005 (UTC)
Why is there a page for "spiral and radial cleavage" but no page for holoblastic cleavage. It seems like a very strange idea for a article; grouping two (of the four listed here) types of holoblastic cleavage together. I think there needs to be a separate page for holoblastic cleavage or just merge the spiral and radial cleavage page into Cleavage (embryo). Jack (talk) 19:51, 16 January 2008 (UTC)
Yes, I tend to agree. This isn't a particularly long page and the articles aren't going anywhere fast. I merged spiral and radial together as well as determinate and indeterminate, but that was just a start. Merging both of them here sounds like a good idea to me. Just remember to add a merge template to this page too (multimerge is the one you'll want). Richard001 (talk) 06:15, 18 January 2008 (UTC)
Okay I've redirected this page as all the information (minus the links) was exactly the same. Jack (talk) 18:07, 24 February 2008 (UTC)
In the summary, I'm not certain if the marsupials have radial, rotational or other type of cleavage (nothing was said about it in the books of Gilbert and Kardong). Comparing this illustration  (figure 11.21) and this other  (p. 46), I think they have rotational cleavage.Zorahia (talk) 23:04, 21 August 2013 (UTC)