lophophore

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Related to Lophophores: Bryozoans, Lophophorata

lophophore

the ring of ciliated tentacles around the mouth in polyzoans and brachiopods.
References in periodicals archive ?
pacifica until 3 days after metamorphosis, though it repeatedly touched, and caused the retraction of, a lophophore on day 2.
According to Fursich and Hurst (1974), spiriferinid brachiopods such as Liospiriferina have the most efficient lophophores and thus are favored under the here described low energy/low food supply conditions.
To minimize the energy cost of pumping water through their lophophores, he discovered, small brachiopods open their shells to a wide gape.
These suggestions were based primarily on observations that chimney spacing is reduced in colonies found in sites with high environmental current speeds (Okamura and Partridge, 1999), and in colonies in which spines have formed between the lophophores (Grunbaum, 1997).
To test the hypothesis that high excurrent flow speed induces chimney formation, I injected seawater under the canopy of lophophores through a small tube to locally increase the excurrent flow speed out the canopy edge (Fig.
Remodeling of this system could result from changing the extension or orientation of lophophores, from degeneration of feeding zooids, or from regeneration of nonfeeding zooids.
He concludes that this pressure below the lophophores should increase resistance to water flow and greatly reduce feeding currents.
membranacea within the paternal coeloms (perivisceral and lophophoral), in seawater after spawning, and within the lophophores of conspecifics.
The mean diameter of lophophores decreased significantly with increased flow (Kruskal-Wallis test: [H.
A priori, the former reason appears less satisfactory given that lophophore size decreases significantly as a function of larval swimming duration (Wendt, 1996) and that smaller lophophores generate currents with lower velocities (Best and Thorpe, 1986).
Several workers have postulated that the lophophores of brachiopods, bryozoans, and phoronids are homologous to the tentaculate arms of pterobranch hemichordates (3-8), leading to phylogenetic hypotheses that support the notion of homology among these structures (8, 9).
posidoniae, Silen reported that spawned sperm caught by lophophores of neighboring colonies became attached to the abfrontal sides of the tentacles.