freshwater sponge

  • 1freshwater sponge —  any of about 20 species of the genus Spongilla (class Demospongiae, siliceous sponges), a common, widely occurring group. Spongilla species are found in clean lake waters and slow streams.       Freshwater sponges are delicate in structure,… …

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  • 2Sponge spicule — Sponge spicules Spicules are structural elements found in most sponges. They provide structural support and deter predators. Large spicules, visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed… …

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  • 3Sponge — This article is about the aquatic animal. For the porous cleaning tool, see Sponge (material). For other uses, see Sponge (disambiguation). Sponge Temporal range: Ediacaran–Recent …

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  • 4sponge — spongeless, adj. spongelike, adj. spongingly, adv. /spunj/, n., v., sponged, sponging. n. 1. any aquatic, chiefly marine animal of the phylum Porifera, having a porous structure and usually a horny, siliceous or calcareous internal skeleton or… …

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  • 5Freshwater environmental quality parameters — are the natural and man made chemical, biological and microbiological characteristics of rivers, lakes and ground waters, the ways they are measured and the ways that they change. The values or concentrations attributed to such parameters can be… …

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  • 6siliceous sponge — ▪ sponge       any sponge in which the main skeletal component is silica as opposed to calcium carbonate or fibrous organic materials only. More than 95 percent of all known sponge species have a siliceous skeleton and belong to the class… …

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  • 7Polymastia (sponge) — Taxobox name = Polymastia regnum = Animalia phylum = Porifera classis = Demospongiae ordo = Hadromerida familia = Polymastiidae genus = Polymastia genus authority = Bowerbank, 1863 subdivision ranks = Species subdivision = see text Polymastia is… …

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  • 8Spongilla —       sponge genus that includes the freshwater sponge (q.v.) species. * * * …

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  • 9Spongilla 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 =… …

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  • 10Spongilla — 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 …

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  • 11Ceramics of indigenous peoples of the Americas — Moche portrait vessel, Musée du quai Branly, ca. 100 700 CE, 16 x 29 x 22 cm …

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  • 12spongillafly — /spun jil euh fluy , spon /, n., pl. spongillaflies. spongefly. [ < NL spongilla (L spong(ia) SPONGE + illa dim. suffix) + FLY2] * * * ▪ insect       any of a group of insects (order Neuroptera) that are smoky brown in colour and resemble&#8230; …

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  • 13Contractile vacuole — Protist Paramecium aurelia with contractile vacuoles A contractile vacuole (abbreviation: CV) is a sub cellular structure (organelle) involved in osmoregulation. It is found predominantly in protists and in unicellular algae. It was previously&#8230; …

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  • 14Sisyridae — Taxobox name = Spongillaflies fossil range=Early Cretaceous Recent regnum = Animalia phylum = Arthropoda subphylum = Hexapoda classis = Insecta subclassis = Pterygota infraclassis = Neoptera superordo = Endopterygota or Neuropterida ordo =&#8230; …

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  • 15Sable Island — Infobox Settlement official name = Sable Island other name = île de Sable native name = nickname = settlement type = Station motto = imagesize = 250px image caption = Island from Space Shuttle, April 1994. Oriented clockwise through 225 degrees.&#8230; …

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  • 16Leporacanthicus — Taxobox name = Leporacanthicus regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Siluriformes familia = Loricariidae subfamilia = Hypostominae tribus = Ancistrini genus = Leporacanthicus genus authority = Isbrücker Nijssen, 1989 …

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  • 17Schwämme — Große Vasenschwämme (Xestospongia testudinaria) Systematik Klassifikation: Lebewesen Domäne …

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  • 18Metaniidae — &#160; Metaniidae Clasificación científica Reino: Animalia …

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  • 19gemmule — /jem yoohl/, n. 1. Bot. gemma. 2. Zool. an asexually produced mass of cells that is capable of developing into an animal, as a freshwater sponge. 3. Evolution. one of the hypothetical living units conceived by Darwin in the theory of pangenesis&#8230; …

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  • 20gemmule — [ dʒɛmju:l] noun Zoology a tough coated dormant cluster of embryonic cells produced by a freshwater sponge for development in more favourable conditions. Derivatives gemmulation noun Origin C19: from Fr., from L. gemmula, dimin. of gemma bud,&#8230; …

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