Spongilla

Spongilla

Taxobox



image_width = 250px
image_caption = "Spongilla lacustris" found in the Hanford Reach of the Columbia River, Washington, USA.
name = Spongilla
regnum = Animalia
phylum = Porifera
classis = Demospongiae
classis_authority = Sollas, 1885
ordo = Haplosclerida
familia = Spongillidae
genus = "Spongilla"
subdivision_ranks = Species
subdivision = "Spongilla alba"
"Spongilla arctica"
"Spongilla aspinosa"
"Spongilla cenota"
"Spongilla helvetica"
"Spongilla inarmata"
"Spongilla lacustris"
"Spongilla wagneri"

"Spongilla" is a genus of freshwater sponges found in lakes and slow streams. There are around twenty species of freshwater sponges, all occurring in this genus. Sponges of the genus "Spongilla" attach themselves to rocks and logs and filter the water for various small aquatic organisms such as protozoa, bacteria, and other free-floating pond life. Unlike marine sponges, fresh-water sponges are exposed to far more adverse and variable environmental conditions, and therefore they have developed gemmules as a means of dormancy. When exposed to excessively cold or otherwise harsh situations, the sponges form these gemmules, which are highly resistant "buds" that can live dormantly after the mother sponge has died. When conditions improve, the gemmules will "germinate" and a new sponge is born.

References

* Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 19, 2007 at http://animaldiversity.org.
* "freshwater sponge." Encyclopædia Britannica. 2007. Encyclopædia Britannica Online. 19 Feb. 2007 .
* Carolina Biological. Protozoa and Invertebrates Manual. Burlington NC: 1980.


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  • Spongilla — Spon*gil la (sp[o^]n*j[i^]l l[.a]), n. [NL., dim. of spongia a sponge.] (Zo[ o]l.) A genus of siliceous sponges found in fresh water. [1913 Webster] …   The Collaborative International Dictionary of English

  • Spongilla — Spongilla, Süßwasserschwämme, Gattung der Wasserschwämme, welche von Einigen zu den Korallenpolypen, von andern zu den Pflanzen gezählt wird, aus ungegliederten, häutigen, gelbrothe, nadelkopfgroße Körner enthaltenden Röhren bestehende verzweigte …   Pierer's Universal-Lexikon

  • Spongilla — Spongilla, Spongillidae, s. Schwämme, S. 105 …   Meyers Großes Konversations-Lexikon

  • Spongilla — Spongilla, s. Süßwasserschwamm …   Kleines Konversations-Lexikon

  • spongilla — spon·gìl·la s.f. TS zool. spugna d acqua dolce del genere Spongilla | con iniz. maiusc., genere della famiglia degli Spongillidi {{line}} {{/line}} DATA: 1838. ETIMO: dal lat. scient. Spongilla, v. anche spongia …   Dizionario italiano

  • Spongilla — см. Бадяга …   Энциклопедический словарь Ф.А. Брокгауза и И.А. Ефрона

  • Spongilla —       sponge genus that includes the freshwater sponge (q.v.) species. * * * …   Universalium

  • spongilla — spon·gil·la …   English syllables

  • spongilla — …   Useful english dictionary

  • Spongilla argyrosperma — Taxobox name = Freshwater sponge (North America) image caption = regnum = Animalia phylum = Porifera classis = Demospongiae ordo = Haplosclerida subordo = Spongillina familia = Spongillidae genus = Spongilla species = S. argyrosperma binomial =… …   Wikipedia

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