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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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References in periodicals archive ?
Using larval dispersal simulations based on estimates of the timing of trocophore hatch (i.e., onset of upward swimming) and a three-dimensional hydrodynamic model assimilating observed current data, Miyake et al.
The first larval stage after the trocophore of bivalves is characterised by the beginning of calcification and the formation of a shell-prodissoconch I (PI) followed by the prodissoconch II (P-II), with different structures characteristic of each species (Christo and Absher, 2008).
Whereas, Al Rashdi and Iwao (2008) have described only four stages from fertilization to presettlement as follows; fertilized egg, hatch-out trocophore, presettlement veliger, and metamorphosed larvae.
Pink abalone eggs are negatively buoyant; the trocophore larvae, shortly after hatching (12-18 h), swim to the surface (negative geotaxis), complete larval development within 4-17 days, and then begin settlement (Leighton 1974, Leighton 2000).