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The small, free-swimming, ciliated aquatic larva of various invertebrates, including certain mollusks and annelids.

[Greek trokhos, wheel (from trekhein, to run) + -phore.]


(ˈtrɒkəˌfɔː) or


(Zoology) the ciliated planktonic larva of many invertebrates, including polychaete worms, molluscs, and rotifers
[C19: from Greek trokhos wheel + -phore]


(ˈtrɒk əˌfɔr, -ˌfoʊr)

a ciliate, free-swimming larva common to several groups of invertebrates, as many mollusks and rotifers.
[1890–95; < Greek trochó(s) wheel + -phore]
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The transition stage from trochophores to D-stage veligers was first seen at 22 h postfertilization and were present for only 2 h.
Influence of lowered salinity and elevated cadmium on the survival and metamorphosis of trochophores in Capitella sp.
Hatching success (Stage 14) was calculated by dividing the number of trochophores by the starting number of fertilized eggs.
Trochophores and veligers were moving within egg capsules on days 4 and 6, respectively.
Conversely, the apical tuft was observed on trochophores just before hatching into the veliger stage, before the velum division (Koike 1978).
For example, for 3-day-old trochophores of the capitellid Mediomastus fragile (presumed to feed with opposed bands), maximum clearance was [approximately equal to]0.
Homology of the ciliary bands of spiralian trochophores and other larvae.
After the initial mineralization, the larvae are often called trochophores and the new mineralized shell is homogenous and composed mostly of calcium carbonate (Eyster 1986).
collaris covers about the same fraction of the total surface area of the larva when compared with early trochophores of other polychaetes (14% as compared to 11%-38% for other polychaetes; Costello, 1945; Anderson, 1959; Akesson, 1967).
Some correlations between indicators of reproductive and larval performance were significant (Table 2); fecundity was correlated with the number of trochophores (r = 0.
These large cells are shed at metamorphosis just like the trochoblasts of planktotrophic trochophores.