Canningella (trilobite)
''Canningella'' is an extinct genus of sponge in the family Anthaspidellidae. There are at least four described species in ''Canningella''. Species These four species belong to the genus ''Canningella'': * † ''Canningella expansa'' Rigby, 1986 * † ''Canningella interrupta'' Rigby, 1986 * † ''Canningella magnipora'' Rigby, 1986 * † ''Canningella obconica'' Rigby, 1986 References {{Taxonbar, from=Q85750478 Tetractinomorpha Articles created by Qbugbot ...
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Tetractinomorpha
Demosponges or common sponges are sponges of the class Demospongiae (from + ), the most diverse group in the phylum Porifera which include greater than 90% of all extant sponges with nearly 8,800 species worldwide (according to the World Porifera Database). Being siliceous sponges, they are predominantly leuconoid in structure with an endoskeleton made of a meshwork of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges. Some species, in particular from the Antarctic, obtain the silica for spicule-building from the ingestion of diatoms. The many diverse orders in this class include all of the large sponges. About 311 million years ago, in the Late Carboniferous, the order Spongillida split from the marine sponges, and is the only sponges to live in freshwater environments. Some species are brightly colored, with great variety in ...
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