Phragmatopoma californica, commonly known as the sandcastle worm, the honeycomb worm or the honeycomb tube worm, is a reef-forming marine polychaete worm belonging to the family Sabellarididae. It is dark brown in color with a crown of lavender tentacles and has a length of up to about 7.5 centimeters (3.0 in). The worm inhabits the Californian coast, from Sonoma County to northern Baja California.
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| - Phragmatopoma californica (nl)
- Phragmatopoma californica (en)
- Phragmatopoma californica (sv)
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| - Phragmatopoma californica is een borstelworm uit de familie Sabellariidae. Het lichaam van de worm bestaat uit een kop, een cilindrisch, gesegmenteerd lichaam en een staartstukje. De kop bestaat uit een prostomium (gedeelte voor de mondopening) en een peristomium (gedeelte rond de mond) en draagt gepaarde aanhangsels (palpen, antennen en cirri). Phragmatopoma californica werd in 1889 voor het eerst wetenschappelijk beschreven door Fewkes. (nl)
- Phragmatopoma californica är en ringmaskart som först beskrevs av Fewkes 1889. Phragmatopoma californica ingår i släktet Phragmatopoma och familjen Sabellariidae. Inga underarter finns listade i Catalogue of Life. (sv)
- Phragmatopoma californica, commonly known as the sandcastle worm, the honeycomb worm or the honeycomb tube worm, is a reef-forming marine polychaete worm belonging to the family Sabellarididae. It is dark brown in color with a crown of lavender tentacles and has a length of up to about 7.5 centimeters (3.0 in). The worm inhabits the Californian coast, from Sonoma County to northern Baja California. (en)
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| - Sandcastle worm in captivity, building its tube out of sand and white ceramic beads (en)
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| - Phragmatopoma californica (en)
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| - Phragmatopoma californica, commonly known as the sandcastle worm, the honeycomb worm or the honeycomb tube worm, is a reef-forming marine polychaete worm belonging to the family Sabellarididae. It is dark brown in color with a crown of lavender tentacles and has a length of up to about 7.5 centimeters (3.0 in). The worm inhabits the Californian coast, from Sonoma County to northern Baja California. Sandcastle worms live in colonies, building tube reefs somewhat similar to sandcastles (hence the name), which are often seen on rocky beaches at medium and low tide. The sandcastles, which have a honeycomb-like outward appearance, can cover an area of up to 2 meters (6.6 ft) on a side. They may share areas with mussel beds and are found in any place that provides some shelter, such as rock faces, overhanging ledges and concave shorelines. The worms remain in their tubes and are almost never seen. At low tide, when above the water, they close the entrance to their tubes with a shield-like operculum made of dark setae. When submerged, they extend their tentacles out of the tube to catch food particles and sand grains. The grains are sorted, with the best ones used to keep the tube in repair, and the rest ejected. The colonies are formed by the gregarious settlement of larvae, which require contact with an existing colony to metamorphose into adult worms. Gregarious settlement of this species has been linked to specific free fatty acids associated with the tubes of adult worms. On rocky beaches, settlement is dependent on larval behavior in the water column and perception of chemical cues when the larvae contact the tubes. Sandcastle worms should not be confused with the similar, but more northern Sabellaria cementarium which are found from Alaska to southern California and have an amber-colored operculum. Unlike P. californica, S. cementarium rarely forms colonies, does not settle gregariously, and its larvae do not respond to free fatty acids. (en)
- Phragmatopoma californica is een borstelworm uit de familie Sabellariidae. Het lichaam van de worm bestaat uit een kop, een cilindrisch, gesegmenteerd lichaam en een staartstukje. De kop bestaat uit een prostomium (gedeelte voor de mondopening) en een peristomium (gedeelte rond de mond) en draagt gepaarde aanhangsels (palpen, antennen en cirri). Phragmatopoma californica werd in 1889 voor het eerst wetenschappelijk beschreven door Fewkes. (nl)
- Phragmatopoma californica är en ringmaskart som först beskrevs av Fewkes 1889. Phragmatopoma californica ingår i släktet Phragmatopoma och familjen Sabellariidae. Inga underarter finns listade i Catalogue of Life. (sv)
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