User talk:Philcha/Sandbox/Phoronid

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Larvae[edit]

The larvae that presumably belong to Phoronopsis albomaculata and P. californica are described. E.N. Temereva. 2009. New data on distribution, morphology and taxonomy of phoronid larvae (Lophophorata: Phoronida). Invertebrate Zoology, 6(1): 47—64 http://www.nature.air.ru/invertebrates/pdf_files/invert6_1_047_064_Temereva.pdf

Actinotrocha vancouverens is larvae of Phoronis ijimai only. The data in Emig, Christian C. (2003). "Phylum: Phoronida" that Actinotrocha vancouverens is larvae of Phoronis hippocrepia is misprint. Phoronis hippocrepia larvae is Actinotrocha hippocrepia. Aleksey (Alnagov (talk) 15:48, 11 March 2011 (UTC))

It is misprint, no doubt. For exampel see other Emig paper: Bailey-Brock, Julie H.; Christian C. Emig (2000). "Hawaiian Phoronida (Lophophorata) and Their Distribution in the Pacific Region". Pacific Science 54 (2): 119-126 http://scholarspace.manoa.hawaii.edu/bitstream/10125/1606/1/v54n2-119-126.pdf Aleksey (Alnagov (talk) 21:11, 11 March 2011 (UTC))

Phoronopsis malakhovi Temereva, 2000 and Phoronis svetlanae Temereva and Malakhov, 1999[edit]

I read Temereva paper about Phoronopsis malakhovi description, for me it is possible convincing. But... Emig considers that the separation of Ph. malakhovi and P. svetlanae in to independent species unjustified. I do not know Emig arguments. Possible these arguments are not published. Who's right?... it is not known if no open debate. Aleksey (Alnagov (talk) 21:11, 11 March 2011 (UTC))

Hi, Aleksey. Thanks for Temereva (2009) and Bailey-Brock & Emig (2000). How can such a small phylum can so much confusion? --Philcha (talk) 10:06, 12 March 2011 (UTC)
The Good question :-) So everywhere. Aleksey (Alnagov (talk) 14:06, 12 March 2011 (UTC))
Phoronopsis malakhovi is accepted as valide species by Ekaterina N. Temereva, Vladimir V. Malakhov, Peter Grobe, Thomas Bartolomaeus.
Ph. malakhovi is accepted as invalide species, junior synonym for Phoronopsis harmeri by Christian Emig. Aleksey (Alnagov (talk) 18:23, 16 March 2011 (UTC))

Request for comments[edit]

If anyone has time, I'd appreciate comments on this Talk page about my draft User:Philcha/Sandbox/Phoronid. I think I've done all of the content - I only need to rewrite the lead and add a comparison of similar phylum. --Philcha (talk) 10:06, 12 March 2011 (UTC)

Origin[edit]

https://picasaweb.google.com/alnagov2/Phoronida?authkey=Gv1sRgCOP03Nv1xq-tcQ#5583191910474516914 Aleksey (Alnagov (talk) 14:06, 12 March 2011 (UTC))

Is Temereva's image of a slug-like larva a hypothetical reconstruction of the remote past, or a drawing of a real present-day species such as Phonronis ovalis, which has a "creeping" or "slug-like" larva. If it's a description of a real species, it would be very interesting to describe in WP a non-actinotroch larva and its metamorphosis, and whether the metamorphosis is as radical and quick (30 minutes) as in an actinotroch larva (with text and full citation details). --Philcha (talk) 09:19, 13 March 2011 (UTC)
It is hypothetically model of the origin of Phoronida (left image), it is not related with P. ovalis larvae development. This idea is based on interpretation of phoronid lateral mesenteries as dissepiment, that is supported by some details phoronid anatomy, data about metameric origin of lateral mesenteries brachiopoda, and data of molecular phylogeny which showed closer relationship Brachiopoda and Phoronida with metameric animals...

Classification of types of development[edit]

  1. The holopelagic development is characteristic for large phoronid, living in a soft ground. All stages of development (from egg to metamorphosis) proceed in water. The number of eggs is measured by thousand, the sizes of eggs – 90 microns, the first floating larva – blastrula. The larvae have rather large size (more than 1 mm), transparent no pigmented integument, greater spaces of blastocoel, a great number of tentacles (more than 24). Actinotrochs spread long numerous tentacles and hover in water. Their style of movement resembles the style of echinoderms larvae: actinotrochs slowly hover in the volume of the water with tentacles moving apart. The larvae long live in plankton for about 2.5–3 months.
  2. The brooding development is characteristic for not large phoronid, living in a hard ground. The stages of early development (from egg to young larva) proceed in brood mass in lophophoral concavity. The number of eggs is measured by hundreds, the sizes of eggs – 100 microns, first floating larva – actinotroch. The larvae have small size (less than 1 mm), dense opaque and pigmented integument, the spaces of blastocoel are narrowed up to thin basal laminae between epithelia, very short tentacles, the number of that does not exceed 14. These phoronid larvae possess extremely powerfully developed perianal ciliated ring. It is formed by very long thick flagellums and serves as the main engine for swimming. Actinotrochs move in water very quickly, rotating around the axis. Their style of movement resembles the style of trochophorcs: actinotrochs quickly move in the volume of the water revolving on own axis. Actinotrochs live in plankton for about 1 month.
  3. The lecithotrophic development is characteristic for one phoronid species – Phoronis ovalis. The larva develops from big egg (125 microns in diameter) and is not swimming and feeding. It is related with very small size of the body of an adult animal and, as consequence, impossibility to produce a considerable quantity of eggs.

Source:

  • E.N. Temereva. 2009. New data on distribution, morphology and taxonomy of phoronid larvae (Lophophorata: Phoronida). Invertebrate Zoology, 6(1): 47—64
  • E.N. Temereva. "Phoronida: construction, development, world fauna, phylogeny". Doctoral dissertation. P. 507. Moscow, 2008. Abstract (in Russian)

Aleksey (Alnagov (talk) 13:49, 13 March 2011 (UTC))

Articles[edit]

Coelomogenesis in larvae of Phoronis ovalis and P. muelleri (Phoronida) Aleksey (Alnagov (talk) 14:30, 13 March 2011 (UTC))

Hi, Aleksey. Thanks for sending me "Coelomogenesis in larvae of Phoronis ovalis and P. muelleri". Unfortunately I can't use any of it on WP unless I can get the citation details - see {{cite journal}} or {{cite book}}, whichever applies. Can you tell me where I can get these details. --Philcha (talk) 16:39, 13 March 2011 (UTC)

For details see this PDFs:
  1. author.pdf
  2. introduction.pdf
  3. chapter1.pdf
  4. chapter2.pdf
  5. summary.pdf
  6. zusammenfassung.pdf
  7. appendix.pdf
Aleksey (Alnagov (talk) 17:48, 13 March 2011 (UTC))
Hi, Aleksey. The problem is that under WP's rules (see WP:V and WP:CITE) citations are required and must provide the bibliographical details - author(s), date, source (name of journal book), pages numbers, etc. - see {{cite journal}} or {{cite book}}, whichever applies. The information must be published in an external source, in this case a scientific publication - see examples in User:Philcha/Sandbox/Phoronid. Can you provide this information? --Philcha (talk) 09:07, 15 March 2011 (UTC)
Let it go at that - Grobe, Peter (2007). Larval Development, the Origin of the Coelom and the Phylogenetic Relationships of the Phoronida. Online Doctoral thesis: Freie Universität Berlin. p. 91.  Unknown parameter |coauthors= ignored (|author= suggested) (help) Aleksey (Alnagov (talk) 18:14, 16 March 2011 (UTC))
  • Malakhov, V.V. (2008). "Are Brachiopods and Phoronids True Metameric Animals?". Journal of Morphology. 269 (12): 1478. doi:10.1002/jmor.10683.  Unknown parameter |coauthors= ignored (|author= suggested) (help)

Aleksey (Alnagov (talk) 14:47, 20 March 2011 (UTC))

Thanks, Aleksey. I'm packing now and going for a holiday Mon 21 Mar to Tues 29 Mar, and then I can start reading all these articles. --Philcha (talk) 17:01, 20 March 2011 (UTC)

Images[edit]

See also WC Phoronis images Aleksey (Alnagov (talk) 17:36, 17 March 2011 (UTC))