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This article is translated from the German Wikipedia some links and vernacular names may be wrong. Jack 23:16, 22 January 2007 (UTC)
As noted supra, this stub article originally (in 2007) was translated from dewiki (the German wikipedia). In September 2017, the German user de:Benutzer:TomCatX made this thorough revision of the dewiki article. The following is a rough translation from German of the article text (sources, weblinks, and categories uncounted), as TomCatX left it (and it still remains):
(Links added. For the two unchanged sentences in the dewiki version, I just copied the (recent) translation by Jackhynes.)
I think that replacing the present text by this translation would be an improvement (of course leaving the nice illustration, and preferrably first resolving what TomCatX here meant by Mundbucht, which literally means 'mouth sac' or 'mouth bay', and in another context is translatable as 'stomodeum'). However, TomCatX also added the Dipleurula item in de:Lexikon der Biologie as a source. (I've added it to the stub, under External links) This indicates that perhaps the 'misunderstanding' TomCatX refers to in the edit summary largely is a confusion of different meanings of the term Dipleurula, more than a confusion between an hypothesis and an abstraction. In fact, the Lexikon der Biologie article refer to three meanings, of which the most common are
and
("Sense 2" was denoted "rare", and could probably be ignored. I'm not providing an exact translation, since the Lexikon der Biologie article is copyrighted, but rather extract factual content from them.)
The sense 1, as described here, actually could be incorporated into Echinoderm#Larval_development. However, the forn source (provided by User:Stepp-Wulf) claims that also hemichordates have a dipleurula larval phase. This supports the relevance of a stand-alone article. The main relevance however, IMHO, relates to sense 3.
With some risk of WP:OR, my interpretation of the sense 3 description in the Lexikon der Biologie is the following: Embryonic/larval phases often reflect ancestral adult forms. In this case, since the dipleurula phase (or something sufficiently similar) is found in both echinoderms and hemichordates, their most recent common ancestor also should have had such a development phase, or have this as the final ( adult) phase. Therefore, either this phylum, or an ancestor, should be a dipleurula like animal - reasonably also called a dipleurula. This hypothetical animal must be one common ancestor of at least all echinoderms and hemichordates, but could be an ancestor also of other related groups of recent animals, for two reasons:
In fact, the reason I found this stub was that I saw a mention of dipleurula in connection with tunicate larvae.
However, if my interpretation is not borne out by better sources (or by editors with greater biological knowledge and skills in interpreting biological texts), it should not be employed in an article extension. JoergenB ( talk) 21:41, 30 December 2019 (UTC)
This article has a wikiLink on the word auricularia, to link to the larval stage of the sea cucumber, but the link goes to a "genus of jelly fungi". It needs instead to point here: /info/en/?search=Sea_cucumber#Development ; but I don't know how to do that, so could someone more versed in the mechanics of wiki please make that repair? Thanks 2001:56A:F0E9:9B00:1177:ED93:CF7A:DA06 ( talk) 05:41, 23 March 2022 (UTC)JustSomeWikiReader
Hi, I completely revised the page and added links and references (some are old, but I have all the originals and studied them well). Accordingly, I replaced the two [[Wikipedia:Stub]] tags {{echinoderm-stub}}
and {{developmental-biology-stub}}
.
Marci68 (
talk)
15:28, 7 May 2023 (UTC)