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Anheteromeyenia Argyrosperma
''Anheteromeyenia argyrosperma'' is a freshwater sponge Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through t ... found across North America. Geographical range Nearctic region from Canada (Quebec, New Brunswick) to Florida and northern Alaska to southern California. Habitat ''Anheteromeyenia argyrosperma'' is found in both lotic (flowing water) and lentic (still) habitats. Typically in waters of about neutral pH with low to moderate alkalinity and high conductivity; in temperatures of 9 to 23 °C. They are sessile suspension feeders that attach to submerged surfaces such as rocks and logs in most inland habitats. Diet Sponges filter the water through them to collect numerous species of smaller organisms such as bacteria and protozoa. ''Anheteromeyenia argyrosperma'' are especially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmule
Gemmules are internal buds found in sponges and are involved in asexual reproduction. It is an asexually reproduced mass of cells, that is capable of developing into a new organism i.e., an adult sponge. Role in asexual reproduction Asexual reproduction in sponges occurs via budding, either by external or internal buds. The internal buds are called gemmules. Only endogenous types of buds develop into new sponges. Characteristics Gemmules are resistant to desiccation (drying out), freezing, and anoxia (lack of oxygen) and can lie around for long periods of time. Gemmules are analogous to a bacterium's endospore and are made up of amoebocytes surrounded by a layer of spicules Spicules are any of various small needle-like anatomical structures occurring in organisms Spicule may also refer to: *Spicule (sponge), small skeletal elements of sea sponges *Spicule (nematode), reproductive structures found in male nematodes ( ... and can survive conditions that would kill adult spo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spicule (sponge)
Spicules are structural elements found in most Sea sponge, sponges. The meshing of many spicules serves as the sponge's skeleton and thus it provides structural support and potentially defense against predators. Sponge spicules are made of calcium carbonate or Silicon dioxide, silica. Large spicules visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed microscleres. The composition, size, and shape of spicules are major characters in sponge systematics and Taxonomy (biology), taxonomy. Overview Sponges are a species-rich clade of the earliest-diverging (most Basal (phylogenetics), basal) animals. They are distributed globally, with diverse ecologies and functions, and a record spanning at least the entire Phanerozoic. Most sponges produce skeletons formed by spicules, structural elements that develop in a wide variety of sizes and three dimensional shapes. Among the four sub-clades of Porifera, three (Demospongiae, Hexactinelli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sponge
Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. Sponges were first to branch off the evolutionary tree from the last common ancestor of all animals, making them the sister group of all other animals. Etymology The term ''sponge'' derives from the Ancient Greek word ( 'sponge'). Overview Sponges are similar to other animals in that they are multicellular, he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spongillidae
Spongilidae is a family of sponges that live in freshwater lakes and rivers. The following genera are recognized in the family: * ''Anheteromeyenia'' Schröder, 1927 * ''Corvoheteromeyenia'' Ezcurra de Drago, 1979 * ''Corvospongilla'' Annandale, 1911 * ''Dosilia'' Gray, 1867 * ''Duosclera'' Reiswig & Ricciardi, 1993 * ''Ephydatia'' Lamouroux, 1816 * ''Eunapius (genus), Eunapius'' Gray, 1867 * ''Heteromeyenia'' Potts, 1881 * ''Heterorotula'' Penney & Racek, 1968 * ''Nudospongilla'' Annandale, 1918 * ''Pachyrotula'' Volkmer-Ribeiro & Rützler, 1997 * ''Pectispongilla'' Annandale, 1909 * ''Pottsiela'' Volkmer-Ribeiro, Souza-Machado, Furstenau-Oliveira, Vieira-Soares, 2010 * ''Racekiela'' Bass & Volkmer-Ribeiro, 1998 * ''Radiospongilla'' Penney & Racek, 1968 * ''Sanidastra'' Volkmer-Ribeiro & Watanabe, 1983 * ''Saturnospongilla'' Volkmer-Ribeiro, 1976 * ''Spongilla'' Lamarck, 1816 * ''Stratospongilla'' Annandale, 1909 * ''Trochospongilla'' Vejdovsky, 1888 * ''Umborotula'' Penney & Rac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
