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Bryozoans

      The Bryozoa, also known as Ectoprocta or commonly as moss animals, are a phylum of aquatic invertebrate animals. Typically about 0.5 millimetres (0.020 in) long, they are filter feeders that sieve food particles out of the water using a retractable lophophore, a "crown" of tentacles lined with cilia. Most marine species live in tropical waters, but a few occur in oceanic trenches, and others are found in polar waters. One class lives only in a variety of freshwater environments, and a few members of a mostly marine class prefer brackish water. Over 4,000 living species are known. One genus is solitary and the rest colonial. The phylum was originally called "Polyzoa", but this term was superseded by "Bryozoa" in 1831. Another group of animals discovered subsequently, whose filtering mechanism looked similar, was also included in "Bryozoa" until 1869, when the two groups were noted to be very different internally. The more recently discovered group were given the name Entoprocta, while the original "Bryozoa" were called "Ectoprocta". However, "Bryozoa" has remained the more widely used term for the latter group.

Source: en.wikipedia.org/wiki/Bryozoa
Monotrypa YA319
Monotrypa PB675
Monotrypa p5894
Monotrypa MD129
Monotrypa CW2021
Monotrypa CW1964
Monotrypa JP881
Monotrypa p5897
Monticulipora ramosafoto BB445
Polyteichus novakifoto JH1312
Polyteichus novaki YA456
Polyteichus novaki JH1313
Pseudoisotrypa bohemica JH287
Radiopora soukupiEliášová (2005), fig. 4 HF2694
Radiopora soukupi p4476
Reteporina formosa p828
Reteporina formosa p838
Reteporina petala p1135
Reteporina petala p1133
Reteporina petala p4914

Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]