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      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 The phylum was originally called "Polyzoa", but this term was superseded by "Bryozoa" in 1831.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
Radiopora soukupi p4476
Reteporina formosa p828
Reteporina formosa p838
Reteporina petala p4914
Reteporina petala p1135
Reteporina petala p1136
Reteporina petala p1134
Reteporina petala p1133
Reteporina p5022
Reteporina transiens p1005
Reteporina transiens p984
Reteporina transiens p1020
Roemeria bohemica p925
Semicoscinium sacculus JH284
Semicoscinium sacculus JH245
Semicoscinium sacculus JH298
Semicoscinium sacculus p881
Semicoscinium sacculus YA1115
Semicoscinium sacculus p1281
Semicoscinium sacculus YA1116

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