Genus
Myxicola
Myxicola infundibulum. Photo: (c) Frédéric ANDRE, some rights reserved (CC BY-NC)
Sabellidae (feather duster worms) are a family of sedentary marine polychaete tube worms in which the head is mostly concealed by feathery branchiae. Sabellids build tubes out of a tough, parchment-like exudate, strengthened with sand and bits of shell. Unlike the other sabellids, the genus Glomerula secretes a tube of calcium carbonate instead. Sabellidae tend to be common in the intertidal zones around the world. Their oldest fossils are known from the Early Jurassic.
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