Polymastia
Saunders Veterinary Dictionary:
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polymastia
The presence of supernumerary mammary glands or nipples; pleomastia.
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Polymastia (sponge)
| Polymastia | |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Demospongiae |
| Order: | Hadromerida |
| Family: | Polymastiidae |
| Genus: | Polymastia Bowerbank, 1863 |
| Species | |
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30+, see text |
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Polymastia is a genus of sponges (Porifera) containing about 30 species. These are small to large encrusting or dome-shaped sponges with a smooth surface having many teat-shaped projections (papillae). In areas of strong wave action, this genus does not grow the teat structures, but instead grows in a corrugated form[1].
The image depicts Polymastia pachymastia, often called "aggregated nipple sponge", a species found off the coast of northern California[2].
Its species include:
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References
- ^ Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. Two Oceans: a guide to the marine life of southern Africa ISBN 978-1-77007-772-0
- ^ "Polymastia pachymastia de Laubenfels, 1932". World Register of Marine Species. http://www.marinespecies.org/aphia.php?p=taxdetails&id=170652.
- North East Atlantic Taxa
- Michelle Kelly-Borges & Patricia R. Bergquist (1997). "Revision of Southwest Pacific Polymastiidae (Porifera: Demospongiae: Hadromerida) with descriptions of new species of Polymastia Bowerbank, Tylexocladus Topsent, and Acanthopolymastia gen. nov. from New Zealand and the Norfolk Ridge, New Caledonia". New Zealand Journal of Marine and Freshwater Research 31 (3): 367–402. doi:10.1080/00288330.1997.9516772. http://www.rsnz.org/publish/nzjmfr/1997/32.pdf.
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Saunders Veterinary Dictionary
Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.
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![[1]](http://www.imagequest3d.com/cgi-bin/ImageFolio4/imageFolio.cgi?action=view&link=aquatic/porifera&image=JMG00329.jpg&img=&tt=){kind=link}
