Porifera is a taxon of morphologically diverse benthic animals that inhabit marine and freshwater environments from des- ert ponds to caves, from abyssal to. sponges (Porifera, Calcarea) in the Jan. Mayen vent field at the Mohn Ridge. Henning Flørenes. Thesis submitted in partial fulfillment of the requirements for the. Hooper, J.N.A., Kelly, M. & Kennedy, J.A. 06 A new Clathria (Porifera: Demospongiae: Microcionidae) from the Western Indian Ocean. Memoirs of the.

Author: Tojagar Faegul
Country: Iceland
Language: English (Spanish)
Genre: Love
Published (Last): 17 March 2017
Pages: 495
PDF File Size: 7.39 Mb
ePub File Size: 5.10 Mb
ISBN: 641-9-42775-632-7
Downloads: 62780
Price: Free* [*Free Regsitration Required]
Uploader: Ketaur

Sponges are a successful group of mostly marine filter feeder organisms that represent a major life form of several ecosystems. Devoid of organs, the main characteristics of their body plan are the presence of a network of pores at the origin of their namechoanocyte chambers and canals devoted to water filtration and spicules when present allowing tissue physical support.

Porifera (Sponges): Recent Knowledge and New Perspectives

Currently considered as the sister group to all the other animals, these organisms have a key phylogenetic position. Recent studies have shown that they possess an unexpected molecular complexity raising exciting questions about early animal evolution.

The water flow is canalised in an aquiferous system composed of pores ostiacanals and choanocyte chambers. Sponges are divided into four clades […] Hexactinellida, Demospongiae, Calcarea and Homoscleromorpha.


In addition to cell plurifunctionality, the functional plasticity of sponges also relies on a high capacity of cell tentahg. Most of key transcription families and main signalling pathways required for eumetazoan development and body patterning are present in sponges. The recent rising interest for Porifera is expected to lead to a better understanding of animal evolution.

  EN ISO 6506-1 PDF

Porifera; sponges; Metazoa; animal; evolution; multicellularity; tentabg cells; complexity. Two main hypotheses currently proposed concerning nonbilaterian phylogenetic relationships: Modified from Ereskovsky et al.

Modified with permission from Philippe et al. Pictures illustrating the diversity of forms, colours and sizes in Porifera, with a few chosen examples from the four clades.

Possible scenarios of character evolution during animal history, according to the currently most accepted hypothesis of porirera of sponges. Lines represent acquisition of characters, crosses represent losses of characters, red or green colours represent alternative scenarios for a same character. Characters are coded by the following numbers: A case study of the Homoscleromorpha.

Integrative and Comparative Biology Biology of the Cell International Journal of Comprehensive Pharmacy 2: The Homoscleromorph sponge Oscarella lobularis, a promising sponge model in evolutionary and developmental biology.

Developmental Genes and Evolution 1—2: Funayama N The stem cell system in demosponges: Developmental Genes and Evolution Homoscleromorpha formal nomination as a fourth class of Porifera.

PLoS One 8 5: Advances in Marine Biology The role of current induced flow in the design of the sponge body plan.

Journal of Experimental Biology 15; Nielsen C Six major steps in animal evolution: Evolution and Development Molecular Phylogenetics and Evolution 67 1: PLoS Biology 9 3: Improved phylogenomic taxon sampling noticeably affects nonbilaterian relationships. Molecular Biology and Evolution Pronzato R and Manconi R Mediterranean commercial sponges: Reiswig HM In situ pumping activities of tropical Demospongiae. Chinese Journal of Paleontology PLoS Biology 7 1: Journal of Experimental Zoology part A: Comparative Experimental Biology A, 5.


Vacelet J and Duport Prey capture and digestion in the carnivorous sponge Asbestopluma hypogea Porifera: Journal of Medical Mycology Environmental Microbiology 14 2: Insights into the origin of somatic stem cells. Leys SP Gastrulation in Sponges. From cell to embryo, pp 23— Cold Spring Harbor Lab Press.

Komposisi Jenis Dan Kepadatan Sponge (Porifera: Demospongiae) Di Kepulauan Spermonde Kota Makassar

Manuel M Early evolution of symmetry and polarity in metazoan body plans. Comptes Rendus Biologies 2—3: Juenal adults, sponges are sedentary filter feeder animals. At present, the number of formally described sponge species is comprised between and As sponges are devoid of organs, their individual cells or cell layers ensure vital functions.

One cell type may have several functions. Sponges often use both asexual and sexual reproduction.


References Bergquist PR Sponges, p. Ereskovsky AV The comparative embryology of sponges. Further Reading Funayama N The stem cell system in demosponges: Submit a note to the editor about this article by filling in the form fentang. Recent Knowledge and New Perspectives. Sign up for e-alerts. Tansley reviews Read the latest Tansley reviews from New Phytologist.

Wasting time scanning endless search results for the right article? Refine your search, use eLS. Join us on Twitter Follow tweets on recent articles eLifeSciences. Follow us on Facebook.