Amphimedon queenslandica

Amphimedon queenslandica (formerly known as Reniera sp.[2][3]) is a sponge native to the Great Barrier Reef. Its genome has been sequenced.[4] It has been the subject of various studies on the evolution of metazoan development.[2][5]

Amphimedon queenslandica
Amphimedon queenslandica adult
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Porifera
Class: Demospongiae
Order: Haplosclerida
Family: Niphatidae
Genus: Amphimedon
Species:
A. queenslandica
Binomial name
Amphimedon queenslandica
Amphimedon queenslandica stores embryos in its brood chamber.[2] The image is about 4 mm wide.

A. queenslandica was first discovered in 1998 on Heron Island Reef by Sally Leys when looking for sponges with larvae to study polarity,[6] and was formally described by John Hooper and Rob van Soest in 2006.[1] Like most sponges it has a biphasic life cycle, passing through a planktonic phase whilst a larva, but later becoming a benthic dweller.[6] It is hermaphroditic, and reproduces via spermcast spawning,[4] meaning it releases sperm into water but retains eggs, which are fertilised internally.[7] The embryos develop in brood chambers until they reach a certain size, then disperse as parenchymella larvae.[6][8] During this larval stage, they have a strong preference for darkness.[6][9][3] The sponge is difficult or impossible to maintain in captivity.[6]

Genetics

The genome of Amphimedon queenslandica was sequenced in 2009 to provide insights into the evolution of animal complexity[4] and was the first sponge to be sequenced. Subsequent research has also sequenced the genome of the freshwater sponge Ephydatia muelleri.[10]

References
  1. Hooper, John N.A.; Rob W.M. Van Soest (2006-09-14). "A new species of Amphimedon (Porifera, Demospongiae, Haplosclerida, Niphatidae) from the Capricorn-Bunker Group of Islands, Great Barrier Reef, Australia: target species for the 'sponge genome project'" (PDF). Zootaxa. Magnolia Press. 1314: 31–39. doi:10.11646/zootaxa.1314.1.2. hdl:11245/1.265031. Retrieved 2010-04-07.
  2. Adamska, M.; Degnan, S.; Green, K.; Adamski, M.; Craigie, A.; Larroux, C.; Degnan, B.; Fraser, J. (2007). Fraser, James (ed.). "Wnt and TGF-beta expression in the sponge Amphimedon queenslandica and the origin of metazoan embryonic patterning". PLOS ONE. 2 (10): e1031. Bibcode:2007PLoSO...2.1031A. doi:10.1371/journal.pone.0001031. PMC 2000352. PMID 17925879.
  3. Sally P. Leys; Bernard M. Degnan (1 December 2001). "Cytological basis of photoresponsive behavior in a sponge larva". The Biological Bulletin. 201 (3): 323–338. doi:10.2307/1543611. ISSN 0006-3185. JSTOR 1543611. PMID 11751245. Wikidata Q56188960.
  4. Srivastava, M.; Simakov, O.; Chapman, J.; Fahey, B.; Gauthier, M. E. A.; Mitros, T.; Richards, G. S.; Conaco, C.; Dacre, M.; Hellsten, U.; Larroux, C.; Putnam, N. H.; Stanke, M.; Adamska, M.; Darling, A.; Degnan, S. M.; Oakley, T. H.; Plachetzki, D. C.; Zhai, Y.; Adamski, M.; Calcino, A.; Cummins, S. F.; Goodstein, D. M.; Harris, C.; Jackson, D. J.; Leys, S. P.; Shu, S.; Woodcroft, B. J.; Vervoort, M.; Kosik, K. S. (2010). "The Amphimedon queenslandica genome and the evolution of animal complexity". Nature. 466 (7307): 720–726. Bibcode:2010Natur.466..720S. doi:10.1038/nature09201. PMC 3130542. PMID 20686567.
  5. Tompkins-Macdonald, G. .; Gallin, W. .; Sakarya, O. .; Degnan, B. .; Leys, S. .; Boland, L. . (2009). "Expression of a poriferan potassium channel: insights into the evolution of ion channels in metazoans". The Journal of Experimental Biology. 212 (Pt 6): 761–767. doi:10.1242/jeb.026971. PMC 6518305. PMID 19251990.
  6. Degnan, B. M.; Adamska, M.; Craigie, A.; Degnan, S. M.; Fahey, B.; Gauthier, M.; Hooper, J. N. A.; Larroux, C.; Leys, S. P.; Lovas, E.; Richards, G. S. (2008). "The Demosponge Amphimedon queenslandica: Reconstructing the Ancestral Metazoan Genome and Deciphering the Origin of Animal Multicellularity". Cold Spring Harbor Protocols. 2008 (13): pdb.emo108. doi:10.1101/pdb.emo108. PMID 21356734.
  7. Bishop, J. D. D.; Pemberton, A. J. (2006). "The third way: spermcast mating in sessile marine invertebrates". Integrative and Comparative Biology. 46 (4): 398–406. doi:10.1093/icb/icj037. PMID 21672752.
  8. Leys, Sally P.; Degnan, Bernard M. (2005-05-12). "Embryogenesis and metamorphosis in a haplosclerid demosponge: gastrulation and transdifferentiation of larval ciliated cells to choanocytes". Invertebrate Biology. 121 (3): 171–189. doi:10.1111/j.1744-7410.2002.tb00058.x.
  9. Sally P Leys; Thomas W Cronin; Bernard M Degnan; Justin N Marshall (15 March 2002). "Spectral sensitivity in a sponge larva" (PDF). Journal of Comparative Physiology. 188 (3): 199–202. doi:10.1007/S00359-002-0293-Y. ISSN 0302-9824. PMID 11976887. Wikidata Q50500452.
  10. Kenny, Nathan J (27 July 2020). "Tracing animal genomic evolution with the chromosomal-level assembly of the freshwater sponge Ephydatia muelleri". Nature Communications. 11 (3676): 3676. doi:10.1038/s41467-020-17397-w. PMC 7385117. PMID 32719321.


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