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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 The phylum was originally called "Polyzoa", but this term was superseded by "Bryozoa" in 1831.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
Fenestrellina pannosa p1003
Fenestrellina pannosa p992
Fenestrellina CW904
Fenestrellina p1286
Hederella Hall, 1881 PB323
Hederelloidea p5882
Hemitrypa bohemica YA1112
Hemitrypa bohemica YA1117
Hemitrypa bohemica JH292
Hemitrypa p1279
Hemitrypa YA1118
Hemitrypa tenella p887
Isotrypa YA937
Isotrypa CW1488
Isotrypa p1344
Kanerra mirabilis p2598
Marcusodictyon exspectansMergl (1984b), Pl. II, fig. 2 MM217
Marcusodictyon exspectansMergl (1984b), Pl. I, fig. 2 MM211
Marcusodictyon exspectansMergl (1984b), Pl. I, fig. 3 MM212
Marcusodictyon exspectansMergl (1984b), Pl. I, fig. 6 MM215

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