Trochophore

Source: Wikipedia, the free encyclopedia.
blastocoele

A trochophore (

cilia
.

By moving their cilia rapidly, they make a water eddy to control their movement, and to bring their food closer in order to capture it more easily.

Occurrence

Trochophores exist as a larval form within the

molluscs, annelids (including echiurans and sipunculans) and nemerteans. Together, these phyla make up part of the Lophotrochozoa
; it is possible that trochophore larvae were present in the life cycle of the group's common ancestor.

Etymology

The term trochophore derives from the ancient Greek τροχός (trókhos), meaning "wheel", and φέρω (phérō) — or φορέω (phoréō) —, meaning 'to bear, to carry',[3] because the larva is bearing a wheel-shaped band of cilia.

Feeding habits

Trochophore larvae are often planktotrophic; that is, they feed on other plankton species.

Life cycle

Bright-field microscope image of trochophore of annelid Pomatoceros lamarckii (family Serpulidae)[4]

The example of the development of the annelid Pomatoceros lamarckii (family Serpulidae) shows various trochophore stages (image: D-F):
D - early trochophore ;
E - complete trochophore ;
F - late trochophore ;
G - metatrochophore.

9-hour-old trochophore of the marine gastropod Haliotis asinina (sf - shell field)[5]
Polyplacophora
: First image shows the trochophore, second shows the stadium in metamorphosis, third is a juvenile (scanning electron microscope: SEM)

References

  1. ^ "Trochophore". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2020-03-22.
  2. ^ "Trochophore". Dictionary.com Unabridged (Online). n.d. Retrieved 2016-01-21.
  3. ^ Bailly, Anatole. "Greek-french dictionary online". www.tabularium.be. Retrieved 2017-01-24.
  4. PMID 17032451
    .
  5. PMID 17845714
    .

External links

Wikimedia Commons has media related to Trochophore.
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